move to 2020 fodler

2026-04-03 03:15:23 +00:00 · 2021-12-01 11:43:46 +01:00
parent 1139eb9cd6
commit e88c99bb86
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--- a/2020/.gitignore
+++ b/2020/.gitignore
@@ -0,0 +1,129 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
--- a/2020/README.md
+++ b/2020/README.md
@@ -0,0 +1,9 @@
+# Advent Of Code Solutions
+
+Here are my solutions for the advent of code 2020 🎄🎅
+
+Note that the exact solutions are different for some people.
+
+The main ones are solved in python. 1-4 I also did in Go, but I quickly [did not like it](./learning/Go.md).
+
+`/solutions/:day/*`
--- a/2020/learning/Go.md
+++ b/2020/learning/Go.md
@@ -0,0 +1,15 @@
+# Go Learning
+
+So this will be my first time at writing some go.
+Please excuse me for the ranting 😅
+
+## WTFs
+
+- Why is there no bitwise OR for bools?! Please what? XOR == `a != b`, but still...
+- `math.Max()` only works with floats. Of course.
+- so apparently we don't have optional parameters and defaults. Lol
+- go has maps, but no native way of getting keys or values without a loop
+
+## Syntax
+
+- we constantly need to write `:=` which is annoying as hell
--- a/2020/solutions/1/README.md
+++ b/2020/solutions/1/README.md
@@ -0,0 +1,12 @@
+# 1
+
+This is quite simple, just iterate and find.
+
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>1224 and 796 -> 974304</li>
+    <li>332, 858 and 830 -> 236430480</li>
+  </ol>
+</details>
--- a/2020/solutions/1/data.txt
+++ b/2020/solutions/1/data.txt
@@ -0,0 +1,200 @@
+1472
+1757
+1404
+1663
+1365
+1974
+1649
+1489
+1795
+1821
+1858
+1941
+1943
+1634
+1485
+1838
+817
+1815
+1442
+639
+1182
+1632
+1587
+1918
+1040
+1441
+1784
+1725
+1951
+1285
+285
+1224
+1755
+1748
+1488
+1374
+1946
+1771
+1809
+1929
+1621
+1462
+2001
+1588
+1888
+1959
+1787
+1690
+1363
+1567
+1853
+1990
+1819
+1904
+1458
+1882
+1348
+1957
+1454
+1557
+1471
+332
+1805
+1826
+1745
+1154
+1423
+1852
+1751
+1194
+1430
+1849
+1962
+1577
+1470
+1509
+1673
+1883
+1479
+1487
+2007
+1555
+1504
+1570
+2004
+978
+1681
+1631
+1791
+1267
+1245
+1383
+1482
+1355
+1792
+1806
+1376
+1199
+1391
+1759
+1474
+1268
+1942
+1936
+1766
+1233
+1876
+1674
+1761
+1542
+1468
+1543
+1986
+2005
+1689
+1606
+1865
+1783
+1807
+1779
+1860
+1408
+1505
+1435
+1205
+1952
+1201
+1714
+1743
+1872
+1897
+1978
+1683
+1846
+858
+1528
+1629
+1510
+1446
+1869
+1347
+685
+1478
+1387
+687
+1964
+1968
+1429
+1460
+1777
+1417
+1768
+1672
+1767
+1400
+1914
+1715
+1425
+1700
+1756
+1835
+1926
+1889
+1568
+1393
+1960
+1540
+1810
+1401
+1685
+830
+1789
+1652
+1899
+796
+1483
+1261
+1398
+1727
+1566
+1812
+1937
+1993
+1286
+1992
+1611
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+1868
+1870
+1746
+1361
+1418
+1820
+1598
+1911
+1428
+1734
+1833
+1436
+1560
--- a/2020/solutions/1/go/main.go
+++ b/2020/solutions/1/go/main.go
@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strconv"
+	"strings"
+)
+
+const target uint64 = 2020
+
+func findTwo(list []uint64) {
+	for _, a := range list {
+		for _, b := range list {
+			if a+b == target {
+				fmt.Printf("The numbers: %v and %v.\tSolution: %v\n", a, b, a*b)
+				return
+			}
+		}
+
+	}
+}
+
+func findThree(list []uint64) {
+	for _, a := range list {
+		for _, b := range list {
+			for _, c := range list {
+				if a+b+c == target {
+					fmt.Printf("The numbers: %v, %v and %v.\tSolution: %v\n", a, b, c, a*b*c)
+					return
+				}
+			}
+		}
+	}
+}
+
+func main() {
+	data, err := ioutil.ReadFile("./solutions/1/data.txt")
+	if err != nil {
+		fmt.Println("File reading error", err)
+		return
+	}
+
+	lines := strings.Split(strings.TrimSpace(string(data)), "\n")
+	intLines := []uint64{}
+	for _, i := range lines {
+		num, _ := strconv.ParseUint(i, 10, 64)
+		intLines = append(intLines, num)
+	}
+
+	// fmt.Println("Result: ", findTwo(intLines))
+	// fmt.Println("Result: ", findThree(intLines))
+	findTwo(intLines)
+	findThree(intLines)
+}
--- a/2020/solutions/1/python/main.py
+++ b/2020/solutions/1/python/main.py
@@ -0,0 +1,17 @@
+from typing import List
+from itertools import product
+from os.path import join, dirname
+
+target = 2020
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    numbers: List[int] = list(map(int, f.readlines()))
+    for a, b in product(numbers, numbers):
+        if a + b == target:
+            print(f'The numbers: {a} and {b}.\tSolution: {a*b}')
+            break
+
+    for a, b, c in product(numbers, numbers, numbers):
+        if a + b + c == target:
+            print(f'The numbers: {a}, {b} and {c}.\tSolution: {a*b*c}')
+            break
--- a/2020/solutions/1/test.txt
+++ b/2020/solutions/1/test.txt
@@ -0,0 +1,6 @@
+1721
+979
+366
+299
+675
+1456
--- a/2020/solutions/10/README.md
+++ b/2020/solutions/10/README.md
@@ -0,0 +1,43 @@
+# 10
+
+# First
+
+The first one is really easy. Just sort, make the diff and count.
+First I take the list and sort it:
+
+```python
+[16, 10, 15, 5, 1, 11, 7, 19, 6, 12, 4]
+[0, 1, 4, 5, 6, 7, 10, 11, 12, 15, 16, 19, 22] # Sorted and added the wall plug (0) and the phone (biggest + 3)
+[1, 3, 1, 1, 1, 3, 1, 1, 3, 1, 3, 3] # The size of each step
+```
+
+Now we can simply count how many `1` and `3` there are with `l.count(1)`.
+
+## Second
+
+This is where it gets tricky.
+
+First lets find all the consecutive `1`s ad only they can be removed. If we have more than 1 consecutive `1` we can remove one of it. However we need to be careful not to remove to many or the step will be higher than `3` and the chain breaks.
+
+```python
+[1, 1, 1, 1] # We can transform this example by adding 2 numbers together and "joining" them.
+
+[1, 2, 1] # Valid
+[1, 1, 2] # Valid
+[1, 3] # Valid
+[4] # Invalid because we can jump a max of 3 steps at a time.
+```
+
+Now we could iterate but I wanted to find a formula. Not sure this is correct but here we go.
+
+Basically we take the length of the consecutive `1` and compute `2**(l-1)` to get all possible combinations.
+Now we need to subtract the possible `4` which can only be achieved if we have at least 4 numbers -> `floor(l/4)`
+For a grand total of `2**(l-1) - floor(l/4)`
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>2475</li>
+    <li>442136281481216</li>
+  </ol>
+</details>
--- a/2020/solutions/10/data.txt
+++ b/2020/solutions/10/data.txt
@@ -0,0 +1,107 @@
+48
+171
+156
+51
+26
+6
+80
+62
+65
+82
+130
+97
+49
+31
+142
+83
+75
+20
+154
+119
+56
+114
+92
+33
+140
+74
+118
+1
+96
+44
+128
+134
+121
+64
+158
+27
+17
+101
+59
+12
+89
+88
+145
+167
+11
+3
+39
+43
+105
+16
+170
+63
+111
+2
+108
+21
+146
+77
+45
+52
+32
+127
+147
+76
+58
+37
+86
+129
+57
+133
+120
+163
+138
+161
+139
+71
+9
+141
+168
+164
+124
+157
+95
+25
+38
+69
+87
+155
+135
+15
+102
+70
+34
+42
+24
+50
+68
+169
+10
+55
+117
+30
+81
+151
+100
+162
+148
--- a/2020/solutions/10/medium.txt
+++ b/2020/solutions/10/medium.txt
@@ -0,0 +1,31 @@
+28
+33
+18
+42
+31
+14
+46
+20
+48
+47
+24
+23
+49
+45
+19
+38
+39
+11
+1
+32
+25
+35
+8
+17
+7
+9
+4
+2
+34
+10
+3
--- a/2020/solutions/10/python/main.py
+++ b/2020/solutions/10/python/main.py
@@ -0,0 +1,54 @@
+from os.path import join, dirname
+from typing import List, Optional, Set, Tuple
+from itertools import combinations, count
+from math import floor, prod
+
+
+def parse(s: str) -> List[int]:
+    numbers: List[int] = sorted(map(int, s.strip().split('\n')))
+    numbers.insert(0, 0)  # The wall
+    numbers.append(numbers[-1] + 3)  # Phone itself
+    return numbers
+
+
+def diff(l: List[int]) -> List[int]:
+    return [
+        l[x] - l[x-1]
+        for x in range(1, len(l))
+    ]
+
+
+def calc(d: List[int]) -> int:
+    one = d.count(1)
+    three = d.count(3)
+    return one * three
+
+
+def find_valid_permutations(d: List[int]) -> int:
+    i = 0
+    l = len(d)
+    slices: List[int] = []
+    while i < l:
+        if d[i] != 3:
+            try:
+                n = d.index(3, i + 1)  # Find the next three
+                diff = n - i
+                if diff > 1:
+                    slices.append(diff)
+                    i = n
+                    continue
+            except:
+                pass
+        i += 1
+    return prod([
+        2**(s-1) - floor(s/4)
+        for s in slices
+    ])
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    numbers: List[int] = parse(f.read())
+    d = diff(numbers)
+    print(calc(d))
+    print(find_valid_permutations(d))
--- a/2020/solutions/10/test.txt
+++ b/2020/solutions/10/test.txt
@@ -0,0 +1,11 @@
+16
+10
+15
+5
+1
+11
+7
+19
+6
+12
+4
--- a/2020/solutions/11/README.md
+++ b/2020/solutions/11/README.md
@@ -0,0 +1,12 @@
+# 11
+
+Today: Game of life, but a bit different :)
+I lost so much time because I missed that in the second part we now require 5 instead of 4 occupied seats 😩
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>2296</li>
+    <li>2089</li>
+  </ol>
+</details>
--- a/2020/solutions/11/data.txt
+++ b/2020/solutions/11/data.txt
@@ -0,0 +1,91 @@
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+LLLLLL.LLLLLLLLLLLLLLLLL..LLLLLLLLLLLL.LLLLLLLLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLL
+LLLLLL.LLLLLLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLLLLLLLL.LLLL.LL.LLLLL
+LLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLLLLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLLLL.LLLL.LLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLL.LLLLLL.LLLLLLLLLLLLL
+.....L..L...LL....LLLLLL.....L..L..L.LL.L.L.LL...L....L.L..L...L..L.L..LL..LLL...L.L.L...L.LLL...
+LLLLLLLLLLL.LLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLL.L
+LLLLLL.LLLL.LLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLL.LLLLLL.L.LLLLL.LLLLLLL.LLLLL.L.LLLLLLLLLLL
+LLLLLL.LLLL.LLLLL.LLLLL..LLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLL.LLLLL.LLLLLL..LLLLLLLLLLLLLLLLLLL
+LLLLLL.LLLLLLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLL
+LLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLL..LLLLLLLLLLLLL
+L..........L...L.......L.LLLLLL...LL.....L..L.LL....L..L.L...L..L.....LL..L..LL..L.L...L..L.L..L.
+.LLLLL..LLL.LLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLL.LLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLL.L.LLLL.LLLLLLLLLLLL.LLLLL.LLL.LLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLL
+LLLLLLLLLLL.LLLLL.LLLLLLLLLL.LLLLLLLLL.LLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLL.LLLLL.LL.LLLLLLLLLL
+LLL.L....L..L..L..L......L...LL.L..L...LLL...L.....L.LL.LLL........LL..L.L.LL.L..L..L..LLLL.LL...
+LLLLLL.LLLL.LLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LL.LL.LL.LLL.LLLLLL
+LLLLLLLLLLL.LLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLLLLL.LLLLLLL..LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLL..LLLLLLLLLLLL
+LLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLL
+LLLLLL.LLLL.LLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLLLLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLL
+....L....L.....L.....LLLL.......LL.L..L...L.........L.....L......L..L..L.LL.....L..L.L.L.LL...L.L
+LLLLLLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLLL.LL.LL.LLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL
+LLLLLLLLLLL.LLLLLLLLLL.L.LLLLLLLLLLLLL.LLL.LLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLL
+LLLLLL.LLLLLLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLLL.LLLLL.LL.LL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLL.LL.LLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLL
+LLLLLL.LLLL.LLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLLLLLLLLLLLLLLL.LLLLLL.LL.LL.LLLLLLL.LLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL
+...L.L....L.LL....L..LLLL.....L.L.LLL.....L.L.LL.LL......LLL.L.....L..LL.LL.L...L.L..LLL..LL.....
+LLLLLL.LLLL.LLLLL.LLLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLLLLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLL.LLLL
+LLLLLL.LLLL.LLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLLLLLLLL.LL..LLLLLLLLLLLLLLLLLLL
+LLLLLL.LLLL.LLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LL.LLLLLL.LLLLLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLL
+LLLLLL.LLLLLLLLLL.LLLLLL.LLLLLLLLLLLLLLLLLLL.LLLLLLLLL.LL.LLLLL.LLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLL
+LLLLLL.LLLL.LLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLL
+LLLLLLLLLL..LLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLLLL.LLLL.LLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLL.LLLLLLLLLLLL.LLLLLL.LLLLLLL.LLLLL.LLLLLLLLL.LLL
+.L...LL.LLL...L.LL.LL..L......LL.....LL..L..............L....L........LLL...L.L..LL...L....L.....
+LLLLLL.LLLLLLLLLL..LLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLLLLLLLLLLLLLLL.LLLLLL.LLLLL.LLLL.LL.LLLLLL.LLLLLLLL.LLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLLLL.LLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLL.LL.LLLLLLL.L.LLLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLLLLLLLLL.LLLLL.LLLLLL.LLLLLLLLLLLLL..LLLLLLLLLLLLLLLLLLLLLLL.LL.LLLLLLLLLL.LLLLL.LLLLLLLLLLLLL
+LLLLLLLLLLL.LLLLLLLLLLLLLLL.LL.LLLLLLLL..LLL.LLLLLLLLL.LLLLLLLLLLL.LLLLLLLLLL.LLLLL.LLLLLLLLLLLLL
--- a/2020/solutions/11/python/main.py
+++ b/2020/solutions/11/python/main.py
@@ -0,0 +1,99 @@
+from os.path import join, dirname
+from typing import List, Optional
+from itertools import product
+from copy import deepcopy
+
+TSeats = List[List[Optional[bool]]]
+
+mapping = {
+    '.': None,
+    '#': True,
+    'L': False
+}
+inv = {v: k for k, v in mapping.items()}
+
+
+class Seats:
+    p = [-1, 0, 1]
+
+    def __init__(self, plan: str, alt: bool = False) -> None:
+        self.seats: TSeats = [
+            [
+                mapping[seat]
+                for seat in row
+            ]
+            for row in plan.strip().split('\n')
+        ]
+        self.max_x = len(self.seats[0])
+        self.max_y = len(self.seats)
+        self.alt = alt
+
+    def __str__(self) -> str:
+        return '\n'.join([
+            ''.join([inv[seat] for seat in row])
+            for row in self.seats
+        ])
+
+    def find_next_in_direction(self, y: int, x: int, dy: int, dx: int) -> Optional[bool]:
+        y += dy
+        x += dx
+        while 0 <= x < self.max_x and 0 <= y < self.max_y:
+            cur = self.seats[y][x]
+            if cur is not None:
+                return cur
+            y += dy
+            x += dx
+        return None
+
+    def get_occupied(self, y: int, x: int,) -> int:
+        occupied = 0
+        for dx, dy in product(self.p, self.p):
+            if dx == 0 and dy == 0:
+                continue
+            if self.alt and self.find_next_in_direction(y, x, dy, dx) == True:
+                occupied += 1
+            else:
+                dx += x
+                dy += y
+                if 0 <= dx < self.max_x and 0 <= dy < self.max_y and self.seats[dy][dx]:
+                    occupied += 1
+        return occupied
+
+    def iteration(self) -> int:
+        changed = 0
+        future: TSeats = deepcopy(self.seats)
+        required_to_leave = 4 if self.alt else 3
+        for y, x in product(range(self.max_y), range(self.max_x)):
+            current = self.seats[y][x]
+            if current == None:
+                continue
+            occupied = self.get_occupied(y, x)
+            if (current == True and occupied > required_to_leave) or (current == False and occupied == 0):
+                future[y][x] = not current
+                changed += 1
+        self.seats = future
+        return changed
+
+    def count_occupied(self) -> int:
+        return sum([
+            sum([
+                1 if seat == True else 0
+                for seat in row
+            ])
+            for row in self.seats
+        ])
+
+    def find_equilibrium(self) -> int:
+        while self.iteration() > 0:
+            pass
+        return self.count_occupied()
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    txt = f.read()
+    seats = Seats(txt)
+    print(seats.find_equilibrium())
+
+    seats = Seats(txt, True)
+    print(seats.find_equilibrium())
--- a/2020/solutions/11/test.txt
+++ b/2020/solutions/11/test.txt
@@ -0,0 +1,10 @@
+L.LL.LL.LL
+LLLLLLL.LL
+L.L.L..L..
+LLLL.LL.LL
+L.LL.LL.LL
+L.LLLLL.LL
+..L.L.....
+LLLLLLLLLL
+L.LLLLLL.L
+L.LLLLL.LL
--- a/2020/solutions/12/README.md
+++ b/2020/solutions/12/README.md
@@ -0,0 +1,13 @@
+# 12
+
+Let's navigate!
+
+Reminded me that I had to refresh trigonometry a bit xD
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>796</li>
+    <li>39446</li>
+  </ol>
+</details>
--- a/2020/solutions/12/data.txt
+++ b/2020/solutions/12/data.txt
@@ -0,0 +1,773 @@
+R180
+S1
+F44
+R90
+E5
+N3
+E5
+S4
+W1
+F68
+E2
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--- a/2020/solutions/12/python/main.py
+++ b/2020/solutions/12/python/main.py
@@ -0,0 +1,83 @@
+from os.path import join, dirname
+from typing import List, Optional
+from math import cos, sin, radians, atan2, degrees, sqrt
+
+directions = {
+    'N': 0,
+    'E': 90,
+    'S': 180,
+    'W': 270,
+}
+
+
+class Ship:
+
+    def __init__(self, waypoint=False) -> None:
+        self.x: float = 0
+        self.y: float = 0
+        self.d: int = directions['E']
+
+        self.waypoint = waypoint
+        self.wx: float = 10
+        self.wy: float = 1
+
+    @property
+    def distance(self) -> int:
+        return round(abs(self.x) + abs(self.y))
+
+    def __str__(self) -> str:
+        return f'⛴  X={round(self.x)} Y={round(self.y)} 𒎓={round(self.d)}\t🏴‍☠️ X={round(self.wx)} Y={round(self.wy)}'
+
+    def navigate(self,  amount: int, degree: Optional[int] = None) -> None:
+        if degree == None:
+            if self.waypoint:
+                self.x += self.wx * amount
+                self.y += self.wy * amount
+                return
+            degree = self.d
+        dx = amount * sin(radians(degree))
+        dy = amount * cos(radians(degree))
+        if self.waypoint:
+            self.wx += dx
+            self.wy += dy
+        else:
+            self.x += dx
+            self.y += dy
+
+    def move(self, instruction: str) -> None:
+        cmd: str = instruction[0]
+        amount: int = int(instruction[1:])
+        if cmd in directions:
+            self.navigate(amount, degree=directions[cmd])
+        elif cmd == 'F':
+            self.navigate(amount)
+        else:
+            diff = amount if cmd == 'R' else -amount
+            if self.waypoint:
+                size = sqrt(self.wx**2 + self.wy**2)
+                d = degrees(atan2(self.wy, self.wx))
+                d -= diff
+                self.wx = size * cos(radians(d))
+                self.wy = size * sin(radians(d))
+            else:
+                self.d = (self.d + diff) % 360
+
+    def follow(self, file: str) -> None:
+        instructions = file.strip().split('\n')
+        for instruction in instructions:
+            self.move(instruction)
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    txt = f.read()
+
+    ship = Ship()
+    ship.follow(txt)
+    print(ship)
+    print(ship.distance)
+
+    ship = Ship(waypoint=True)
+    ship.follow(txt)
+    print(ship)
+    print(ship.distance)
--- a/2020/solutions/12/test.txt
+++ b/2020/solutions/12/test.txt
@@ -0,0 +1,5 @@
+F10
+N3
+F7
+R90
+F11
--- a/2020/solutions/13/README.md
+++ b/2020/solutions/13/README.md
@@ -0,0 +1,12 @@
+# 13
+
+The second part one was really interesting. While my solution is correct, it takes way to much time in the data set.
+I started by checking what is the biggest ID number and check each location.
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>156</li>
+    <li>404517869995362</li>
+  </ol>
+</details>
--- a/2020/solutions/13/data.txt
+++ b/2020/solutions/13/data.txt
@@ -0,0 +1,2 @@
+1000299
+41,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,37,x,x,x,x,x,971,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,17,13,x,x,x,x,23,x,x,x,x,x,29,x,487,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,19
--- a/2020/solutions/13/python/main.py
+++ b/2020/solutions/13/python/main.py
@@ -0,0 +1,76 @@
+from os.path import join, dirname
+from typing import List, Tuple
+from math import ceil, floor
+
+
+class Station:
+
+    def __init__(self, txt: str) -> None:
+        arrival, busses = txt.strip().split('\n')
+        self.arrival = int(arrival)
+        self.busses = [
+            int(bus)
+            for bus in busses.replace('x', '0').split(',')
+        ]
+
+    @staticmethod
+    def get_next_for_id(id: int, arrival: int) -> int:
+        return id * ceil(arrival / id)
+
+    def find_next(self) -> Tuple[int, int]:
+        arrivals: List[Tuple[int, int]] = []
+        for bus in self.busses:
+            if bus == 0:
+                continue
+            arrivals.append((bus, self.get_next_for_id(bus, self.arrival)))
+        return min(arrivals, key=lambda x: x[1])
+
+    def get_flag(self) -> int:
+        id, arrives = self.find_next()
+        return id * (arrives - self.arrival)
+
+    def contest(self, offset: int = 1) -> int:
+        # Prepare
+        highest = max(self.busses)
+        highest_i = self.busses.index(highest)
+        others = [
+            (bus, i - highest_i)
+            for i, bus in enumerate(self.busses)
+            if bus != 0 and i != highest_i
+        ]
+        others.sort(key=lambda x: x[0], reverse=True)
+
+        # Compute
+        i: int = max(1, floor(offset / highest))
+        while True:
+            x = highest * i
+            error = False
+            for bus, diff in others:
+                dx = x + diff
+                if dx != self.get_next_for_id(bus, dx):
+                    error = True
+                    break
+            if not error:
+                return x - highest_i
+            i += 1
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+
+    # Some "testing"
+    all = {
+        '17,x,13,19': 3417,
+        '67,7,59,61': 754018,
+        '67,x,7,59,61': 779210,
+        '67,7,x,59,61': 1261476,
+        '1789,37,47,1889': 1202161486,
+    }
+    for busses, expected in all.items():
+        station = Station('69\n' + busses)
+        print(expected, expected == station.contest())
+
+    txt = f.read()
+    station = Station(txt)
+    print(station.get_flag())
+    print(station.contest(offset=10**14))
--- a/2020/solutions/13/test.txt
+++ b/2020/solutions/13/test.txt
@@ -0,0 +1,2 @@
+939
+7,13,x,x,59,x,31,19
--- a/2020/solutions/13/train.txt
+++ b/2020/solutions/13/train.txt
@@ -0,0 +1,2 @@
+69
+67,7,x,59,61
--- a/2020/solutions/2/README.md
+++ b/2020/solutions/2/README.md
@@ -0,0 +1,14 @@
+# 2
+
+For the first we can simply count the occurrences and see if they are between the accepted values.
+Just some simple parsing.
+
+The second one is similar, but we can be more efficient if we XOR the first and second position.
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>548</li>
+    <li>502</li>
+  </ol>
+</details>
--- a/2020/solutions/2/data.txt
+++ b/2020/solutions/2/data.txt
--- a/2020/solutions/2/go/main.go
+++ b/2020/solutions/2/go/main.go
@@ -0,0 +1,77 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strconv"
+	"strings"
+)
+
+type sRow struct {
+	min, max       int
+	char, password string
+}
+
+func parse(data []byte) []sRow {
+	parsed := []sRow{}
+	for _, row := range strings.Split(strings.TrimSpace(string(data)), "\n") {
+		s0 := strings.Split(row, ":")
+		rule := strings.TrimSpace(s0[0])
+		password := strings.TrimSpace(s0[1])
+		s1 := strings.Split(rule, " ")
+		minMax := strings.TrimSpace(s1[0])
+		char := strings.TrimSpace(s1[1])
+		s2 := strings.Split(minMax, "-")
+		min, _ := strconv.Atoi(strings.TrimSpace(s2[0]))
+		max, _ := strconv.Atoi(strings.TrimSpace(s2[1]))
+
+		r := sRow{
+			min:      min,
+			max:      max,
+			char:     char,
+			password: password,
+		}
+		parsed = append(parsed, r)
+	}
+	return parsed
+}
+
+func validSimple(rows []sRow) int {
+	valid := 0
+	for _, row := range rows {
+		count := strings.Count(row.password, row.char)
+		if row.min <= count && count <= row.max {
+			valid++
+		}
+	}
+	return valid
+}
+
+func validComplex(rows []sRow) int {
+	valid := 0
+	for _, row := range rows {
+		l := len(row.password)
+		min := row.min - 1
+		max := row.max - 1
+		if min >= l || max >= l {
+			continue
+		}
+		r := []rune(row.password)
+		a := string(r[min]) == row.char
+		b := string(r[max]) == row.char
+		if a != b {
+			valid++
+		}
+	}
+
+	return valid
+}
+
+func main() {
+	data, _ := ioutil.ReadFile("./solutions/2/data.txt")
+	rows := parse(data)
+	simple := validSimple(rows)
+	fmt.Println(simple)
+	complex := validComplex(rows)
+	fmt.Println(complex)
+}
--- a/2020/solutions/2/python/main.py
+++ b/2020/solutions/2/python/main.py
@@ -0,0 +1,27 @@
+from os.path import join, dirname
+
+
+def checkRow(row: str, alternative=False) -> bool:
+    rule, password = map(lambda s: s.strip(), row.split(':'))
+    amount, char = rule.split(' ')
+    minimum, maximum = map(int, amount.split('-'))
+    if alternative:
+        return (password[minimum - 1] == char) ^ (password[maximum - 1] == char)
+    else:
+        occurrences = password.count(char)
+        return minimum <= occurrences <= maximum
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    valid = 0
+    valid_alt = 0
+    rows = list(f.read().strip().split('\n'))
+    for row in rows:
+        if(checkRow(row)):
+            valid += 1
+        if(checkRow(row, alternative=True)):
+            valid_alt += 1
+    print(f'Found {valid} valid passwords.')
+    print('Policy changed...')
+    print(f'Found {valid_alt} valid passwords.')
--- a/2020/solutions/3/README.md
+++ b/2020/solutions/3/README.md
@@ -0,0 +1,16 @@
+# 3
+
+We can simply parse the forest as an array of strings.
+The trees repeat infinitely to the right, this screams for a good mod.
+This means: `char = row[x % len(row)]`. No complex logic needed
+
+For the second one we simply automate the process and sum up the total.
+We can simply encode the coordinates as a function of the index we are current at.
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>252</li>
+    <li>57 * 252 * 64 * 66 * 43 = 2608962048</li>
+  </ol>
+</details>
--- a/2020/solutions/3/data.txt
+++ b/2020/solutions/3/data.txt
@@ -0,0 +1,323 @@
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+..#.......#..####..#....#.##.#.
+#....#.....#.....#...#......#..
+..#....##...#....#..#..#.....#.
+..#.####..............##.......
+.#.........#..#...#.......##...
+#....#.#........#....#...#...##
+.....#..#....#.#..#...#.#.##...
+.##.................#...##.....
+.##.##.##...#...........#...##.
+..#....#..#.....#..#......##...
+.#...........#......#....#..#.#
+.#.#............#..#..#...#....
+....#......#.....#.#.#.....#...
+#.......##.............#.......
+....#....................#.#...
+......#........#..#.#.....#.#..
+.....#..#....#.#........#....#.
+...##.........#...#.##....#..#.
+.#....#..#...#.#.#......#......
+#......#.#.##.#..#..#.....##...
+......#....#.#...#..#.#........
+..#.....##.....#...#.#.......#.
+......#.#.....#........#.......
+......#.#.#...#..#.#.#.#.......
+..#.#.##..#..#..#.#.##...#.....
+......#.#.#......#.....#...#...
+.....#.##....#..##...#...#....#
+..#.....#...........#..#..##...
+..#..#.......#....#....###.#...
--- a/2020/solutions/3/go/main.go
+++ b/2020/solutions/3/go/main.go
@@ -0,0 +1,66 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strings"
+)
+
+const high = rune('#')
+
+type sForest struct {
+	data   [][]bool
+	height int
+	width  int
+}
+
+func (f sForest) at(y, x int) bool {
+	if y >= f.height {
+		return false
+	}
+	return f.data[y][x%f.width]
+}
+
+func (f sForest) traverse(y, x int) int {
+	trees := 0
+	for dy := 0; dy <= f.height; dy++ {
+		tree := f.at(dy*y, dy*x)
+		if tree {
+			trees++
+		}
+	}
+	return trees
+}
+
+func main() {
+	data, _ := ioutil.ReadFile("./solutions/3/data.txt")
+
+	rows := strings.Split(strings.TrimSpace(string(data)), "\n")
+	height, width := len(rows), len(rows[0])
+	d := make([][]bool, height)
+
+	for y, row := range rows {
+		d[y] = make([]bool, width)
+		for x, char := range []rune(row) {
+			d[y][x] = char == high
+		}
+	}
+
+	forest := sForest{
+		data:   d,
+		height: height,
+		width:  width,
+	}
+
+	fmt.Println("Simple: ", forest.traverse(1, 3))
+
+	trees11 := forest.traverse(1, 1)
+	trees13 := forest.traverse(1, 3)
+	trees15 := forest.traverse(1, 5)
+	trees17 := forest.traverse(1, 7)
+	trees21 := forest.traverse(2, 1)
+
+	fmt.Println(trees11, trees13, trees15, trees17, trees21)
+	fmt.Println(trees11 * trees13 * trees15 * trees17 * trees21)
+
+}
--- a/2020/solutions/3/python/main.py
+++ b/2020/solutions/3/python/main.py
@@ -0,0 +1,50 @@
+from typing import Dict
+from os.path import join, dirname
+from functools import reduce
+
+
+class Forest():
+
+    def __init__(self, text: str) -> None:
+        self.text = text.strip().split('\n')
+
+    @property
+    def height(self) -> int:
+        return len(self.text)
+
+    def is_tree_at(self, y: int, x: int) -> bool:
+        if y > self.height:
+            return False
+        row = self.text[y]
+        return row[x % len(row)] == '#'
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    forest = Forest(f.read())
+
+    # 1
+    trees: int = 0
+    for y in range(forest.height):
+        is_tree: bool = forest.is_tree_at(y, y*3)
+        if is_tree:
+            trees += 1
+    print(f'Result Simple: {trees}')
+
+    # 2
+    all: Dict[str, int] = {
+        '11': 0,
+        '13': 0,
+        '15': 0,
+        '17': 0,
+        '21': 0,
+    }
+    for i in range(forest.height):
+        for key, value in all.items():
+            dy, dx = map(int, list(key))
+            y = i * dy
+            x = i * dx
+            if forest.is_tree_at(y, x):
+                all[key] += 1
+    total = reduce((lambda x, y: x * y), all.values())
+    print(f'Result Combined: {list(all.values())} = {total}')
--- a/2020/solutions/3/test.txt
+++ b/2020/solutions/3/test.txt
@@ -0,0 +1,11 @@
+..##.......
+#...#...#..
+.#....#..#.
+..#.#...#.#
+.#...##..#.
+..#.##.....
+.#.#.#....#
+.#........#
+#.##...#...
+#...##....#
+.#..#...#.#
--- a/2020/solutions/4/README.md
+++ b/2020/solutions/4/README.md
@@ -0,0 +1,14 @@
+# 4
+
+This one was a lot of parsing, but nothing regexp can't do.
+The first is quite straight forward, just check that all but `cid` are present.
+
+The second was a bit of validation for each field, but again some simple regexp and number checking and the job is done 🙂
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>206</li>
+    <li>123</li>
+  </ol>
+</details>
--- a/2020/solutions/4/data.txt
+++ b/2020/solutions/4/data.txt
--- a/2020/solutions/4/go/main.go
+++ b/2020/solutions/4/go/main.go
@@ -0,0 +1,103 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"regexp"
+	"strconv"
+	"strings"
+
+	k "github.com/wesovilabs/koazee"
+)
+
+type tPassport = map[string]string
+
+func stringBetween(s string, min, max int) bool {
+	num, _ := strconv.Atoi(s)
+	return min <= num && num <= max
+}
+
+func verifyPassport(passport tPassport) (bool, bool) {
+	requiredKeys := k.StreamOf([]string{"byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid"})
+	eyeColors := k.StreamOf([]string{"amb", "blu", "brn", "gry", "grn", "hzl", "oth"})
+
+	// Simple
+	counted := 0
+	for k := range passport {
+		if k == "cid" {
+			continue
+		}
+		included, _ := requiredKeys.Contains(k)
+		if !included {
+			return false, false
+		}
+		counted++
+	}
+	if counted < 7 {
+		return false, false
+	}
+
+	// Complex
+	if !stringBetween(passport["byr"], 1920, 2002) || !stringBetween(passport["iyr"], 2010, 2020) || !stringBetween(passport["eyr"], 2020, 2030) {
+		return true, false
+	}
+
+	tmp := []rune(passport["hgt"])
+	hgtLen := len(tmp)
+	hgt, _ := strconv.Atoi(string(tmp[0 : hgtLen-2]))
+	unit := string(tmp[hgtLen-2:])
+	if unit != "cm" && unit != "in" {
+		return true, false
+	}
+	if unit == "cm" && (hgt < 150 || hgt > 193) {
+		return true, false
+	}
+	if unit == "in" && (hgt < 59 || hgt > 76) {
+		return true, false
+	}
+
+	if !regexp.MustCompile(`^#[\dabdcdef]{6}$`).MatchString(passport["hcl"]) {
+		return true, false
+	}
+	if !regexp.MustCompile(`^\d{9}$`).MatchString(passport["pid"]) {
+		return true, false
+	}
+
+	ecl, _ := eyeColors.Contains(passport["ecl"])
+	if !ecl {
+		return true, false
+	}
+
+	return true, true
+}
+
+func main() {
+	data, _ := ioutil.ReadFile("./solutions/4/data.txt")
+	passportsRaw := strings.Split(strings.TrimSpace(string(data)), "\n\n")
+	passports := []tPassport{}
+
+	re := regexp.MustCompile(`\n|\s`)
+	for _, passportRaw := range passportsRaw {
+		passport := tPassport{}
+		entries := re.Split(passportRaw, -1)
+		for _, entry := range entries {
+			split := strings.Split(entry, ":")
+			passport[split[0]] = split[1]
+		}
+		passports = append(passports, passport)
+	}
+
+	validSimple := 0
+	validComplex := 0
+	for _, passport := range passports {
+		simple, complex := verifyPassport(passport)
+		if simple {
+			validSimple++
+		}
+		if complex {
+			validComplex++
+		}
+	}
+	fmt.Println("Simple Validation:\t", validSimple)
+	fmt.Println("Extended Validation:\t", validComplex)
+}
--- a/2020/solutions/4/python/main.py
+++ b/2020/solutions/4/python/main.py
@@ -0,0 +1,52 @@
+from os.path import join, dirname
+import re
+
+
+def validate_chunk(chunk, extended=False):
+    parts = re.split(' |\n', chunk.strip())
+    password = dict(map(lambda p: p.split(":"), parts))
+
+    required = ['byr', 'iyr', 'eyr', 'hgt', 'hcl', 'ecl', 'pid']
+    if not all(item in password.keys() for item in required):
+        return False
+
+    if not extended:
+        return True
+
+    if not 1920 <= int(password['byr']) <= 2002:
+        return False
+    if not 2010 <= int(password['iyr']) <= 2020:
+        return False
+    if not 2020 <= int(password['eyr']) <= 2030:
+        return False
+
+    tmp = password['hgt']
+    hgt = int(tmp[:-2])
+    unit = tmp[-2:]
+    if not unit in ['cm', 'in']:
+        return False
+    if unit == 'cm' and not 150 <= hgt <= 193:
+        return False
+    if unit == 'in' and not 59 <= hgt <= 76:
+        return False
+
+    if not re.match(r'^#[\dabcdef]{6}$', password['hcl']):
+        return False
+    if not re.match(r'^\d{9}$', password['pid']):
+        return False
+
+    if password['ecl'] not in ['amb', 'blu', 'brn', 'gry', 'grn', 'hzl', 'oth']:
+        return False
+    return True
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    chunks = re.split('\n\n+', f.read().strip())
+    total_simple = 0
+    total_extended = 0
+    for chunk in chunks:
+        total_simple += int(validate_chunk(chunk))
+        total_extended += int(validate_chunk(chunk, extended=True))
+    print(f'Simple Validation:\t{total_simple}')
+    print(f'Extended Validation:\t{total_extended}')
--- a/2020/solutions/4/test.txt
+++ b/2020/solutions/4/test.txt
@@ -0,0 +1,13 @@
+ecl:gry pid:860033327 eyr:2020 hcl:#fffffd
+byr:1937 iyr:2017 cid:147 hgt:183cm
+
+iyr:2013 ecl:amb cid:350 eyr:2023 pid:028048884
+hcl:#cfa07d byr:1929
+
+hcl:#ae17e1 iyr:2013
+eyr:2024
+ecl:brn pid:760753108 byr:1931
+hgt:179cm
+
+hcl:#cfa07d eyr:2025 pid:166559648
+iyr:2011 ecl:brn hgt:59in
--- a/2020/solutions/5/README.md
+++ b/2020/solutions/5/README.md
@@ -0,0 +1,13 @@
+# 5
+
+For the first one we treat the codes as 2 binary codes. One 7 and the other 3 long.
+
+The second tripped me up as I was returning the binary encoded ticket number but AOC was expecting the seat ID. My bad, took me long to get it. Thanks to @tcq1
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>998</li>
+    <li>84, 4 -> 676</li>
+  </ol>
+</details>
--- a/2020/solutions/5/data.txt
+++ b/2020/solutions/5/data.txt
@@ -0,0 +1,960 @@
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--- a/2020/solutions/5/python/main.py
+++ b/2020/solutions/5/python/main.py
@@ -0,0 +1,51 @@
+from os.path import join, dirname
+from itertools import product
+from typing import Tuple
+
+
+def from_binary(code: str, high: str) -> int:
+    return int(''.join([
+        '1' if char == high else '0'
+        for char in code
+    ]), 2)
+
+
+def read_seat(seat) -> Tuple[int, int]:
+    row_raw = seat[:-3]
+    column_raw = seat[-3:]
+    row = from_binary(row_raw, 'B')
+    column = from_binary(column_raw, 'R')
+    return row, column
+
+
+def seat_code(row: int, column: int) -> int:
+    return row * 8 + column
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    seats = f.read().strip().split('\n')
+
+    free = list(product(range(4, 126), range(8)))
+    maximum = 0
+    for seat in seats:
+        row, column = read_seat(seat)
+        m = row * 8 + column
+        maximum = max(maximum, m)
+        free.remove((row, column))
+
+    print(f"Highers ID:\t{maximum}")
+
+    # Find the remaining seat
+    row_max = 0
+    row_min = 128
+    for row, _ in free:
+        row_max = max(row_max, row)
+        row_min = min(row_min, row)
+    remaining = [
+        (row, column)
+        for row, column in free
+        if row >= row_min + 1 and row <= row_max - 2
+    ][0]
+    my_ticket = seat_code(*remaining)
+    print(f"My Ticket:\t{my_ticket}")
--- a/2020/solutions/5/test.txt
+++ b/2020/solutions/5/test.txt
@@ -0,0 +1,4 @@
+FBFBBFFRLR
+BFFFBBFRRR
+FFFBBBFRRR
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--- a/2020/solutions/6/README.md
+++ b/2020/solutions/6/README.md
@@ -0,0 +1,13 @@
+# 6
+
+Basically I own this one to the built in `set()` of python.
+
+The first is an union, the second an intersection. Did not know they existed
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>6809</li>
+    <li>3394</li>
+  </ol>
+</details>
--- a/2020/solutions/6/data.txt
+++ b/2020/solutions/6/data.txt
--- a/2020/solutions/6/python/main.py
+++ b/2020/solutions/6/python/main.py
@@ -0,0 +1,28 @@
+from os.path import join, dirname
+from itertools import product
+from typing import List, Set, Tuple
+from functools import reduce
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    groups = f.read().strip().split('\n\n')
+
+    at_least_one: List[int] = []
+    everyone: List[int] = []
+    for group in groups:
+        answers: Set[str] = set()
+        combined = None
+        for answer in group.split('\n'):
+            answer = answer.strip()
+            as_set = set(list(answer))
+            answers = answers.union(as_set)
+            combined = as_set if combined == None else combined.intersection(
+                as_set)
+        at_least_one.append(len(answers))
+        everyone.append(len(combined))
+        # print(single)
+        # print(reduce(lambda a, b: a.intersection(b), single))
+
+    print(f'At least one person: {sum(at_least_one)}')
+    print(f'Everyone: {sum(everyone)}')
--- a/2020/solutions/6/test.txt
+++ b/2020/solutions/6/test.txt
@@ -0,0 +1,15 @@
+abc
+
+a
+b
+c
+
+ab
+ac
+
+a
+a
+a
+a
+
+b
--- a/2020/solutions/7/README.md
+++ b/2020/solutions/7/README.md
@@ -0,0 +1,15 @@
+# 7
+
+This one was maybe the coolest yet! Fixed-point iteration and some recursion. Amazing :)
+
+For the first part we iterate as long as we don't find any enclosing bags anymore. This can build long chains.
+
+The second we recurse down the bag chain und sum it up recursively.
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>164</li>
+    <li>7872</li>
+  </ol>
+</details>
--- a/2020/solutions/7/data.txt
+++ b/2020/solutions/7/data.txt
@@ -0,0 +1,594 @@
+pale cyan bags contain 2 posh black bags, 4 wavy gold bags, 2 vibrant brown bags.
+dull lavender bags contain 3 pale tomato bags.
+light red bags contain 3 wavy teal bags, 3 plaid aqua bags, 4 drab lavender bags, 2 bright coral bags.
+wavy green bags contain 3 wavy indigo bags.
+bright blue bags contain 5 vibrant tan bags.
+dotted fuchsia bags contain 5 dark orange bags, 1 shiny coral bag.
+pale tomato bags contain 2 bright magenta bags, 5 dull lime bags.
+light black bags contain 1 posh lavender bag, 5 dotted gold bags, 4 faded bronze bags.
+wavy turquoise bags contain 4 pale teal bags, 2 dim brown bags, 5 muted lime bags.
+striped red bags contain 4 faded brown bags, 4 dotted purple bags.
+wavy silver bags contain 5 muted chartreuse bags, 1 light silver bag, 3 striped silver bags.
+posh lavender bags contain 5 striped silver bags, 3 wavy beige bags, 3 dim brown bags, 5 clear indigo bags.
+pale maroon bags contain 1 striped white bag, 4 light blue bags.
+drab turquoise bags contain 2 shiny tomato bags.
+dark aqua bags contain 2 plaid silver bags.
+vibrant coral bags contain 3 wavy lime bags, 2 shiny gold bags, 1 dotted orange bag, 3 muted indigo bags.
+clear green bags contain 1 clear olive bag.
+striped indigo bags contain 3 striped turquoise bags.
+clear lime bags contain 3 mirrored green bags, 2 light tan bags.
+drab bronze bags contain 5 plaid lavender bags, 1 muted yellow bag, 5 vibrant coral bags.
+drab lavender bags contain 1 posh tomato bag, 4 muted salmon bags, 4 dull lime bags.
+striped aqua bags contain 1 pale maroon bag.
+wavy gray bags contain 3 light tan bags, 2 pale white bags, 2 bright magenta bags, 5 muted salmon bags.
+faded aqua bags contain 1 plaid salmon bag, 4 dotted yellow bags.
+drab cyan bags contain 1 posh tomato bag, 4 shiny turquoise bags.
+vibrant blue bags contain no other bags.
+light lime bags contain 3 vibrant purple bags.
+clear gray bags contain 3 mirrored olive bags, 3 clear crimson bags, 5 dark orange bags, 2 dim gold bags.
+bright magenta bags contain no other bags.
+wavy purple bags contain 4 dim gold bags, 5 light green bags.
+muted bronze bags contain 2 pale beige bags, 2 clear turquoise bags, 5 posh white bags, 1 wavy gray bag.
+striped violet bags contain 1 light gold bag.
+dull salmon bags contain 2 posh gray bags, 2 dotted blue bags.
+striped orange bags contain 3 faded coral bags, 3 dotted lavender bags.
+drab coral bags contain 1 wavy indigo bag, 1 dull black bag, 3 mirrored chartreuse bags.
+plaid yellow bags contain 5 faded cyan bags.
+dark maroon bags contain 2 mirrored silver bags, 5 muted salmon bags, 1 dull tomato bag.
+dark yellow bags contain 1 drab maroon bag, 5 faded cyan bags, 4 clear indigo bags.
+posh teal bags contain 3 vibrant maroon bags, 3 posh salmon bags.
+mirrored black bags contain 1 drab fuchsia bag, 2 posh red bags.
+drab salmon bags contain 2 dull plum bags.
+muted green bags contain 4 plaid gray bags, 2 dim turquoise bags, 2 dull coral bags, 4 dim white bags.
+bright indigo bags contain 1 bright turquoise bag, 4 dark beige bags.
+wavy fuchsia bags contain 1 clear violet bag, 4 striped bronze bags, 1 mirrored indigo bag, 1 shiny cyan bag.
+bright brown bags contain 5 dark purple bags.
+dull turquoise bags contain 3 dim yellow bags, 2 dim indigo bags.
+pale coral bags contain 4 posh indigo bags.
+striped green bags contain 4 dull green bags, 5 dotted turquoise bags, 3 pale red bags, 2 dark gold bags.
+faded maroon bags contain 3 dim green bags, 4 wavy purple bags.
+vibrant lime bags contain 3 shiny fuchsia bags, 1 pale red bag, 1 vibrant bronze bag.
+shiny plum bags contain 2 bright maroon bags, 5 dull tomato bags, 2 plaid salmon bags, 3 bright lime bags.
+faded silver bags contain 1 posh turquoise bag, 5 posh white bags, 5 wavy lime bags, 3 shiny coral bags.
+mirrored tomato bags contain 3 dotted tomato bags, 4 vibrant blue bags, 4 dull yellow bags, 5 clear chartreuse bags.
+pale red bags contain 5 vibrant indigo bags, 4 vibrant red bags, 3 bright magenta bags, 3 dim indigo bags.
+drab blue bags contain 2 bright magenta bags.
+dim purple bags contain 4 drab lavender bags, 4 plaid yellow bags, 5 dull white bags, 3 clear white bags.
+dim red bags contain 5 striped silver bags, 1 shiny red bag.
+dim lime bags contain 5 plaid bronze bags, 5 drab salmon bags.
+mirrored beige bags contain 3 bright tomato bags, 2 dull lime bags.
+bright lime bags contain 5 clear chartreuse bags.
+clear chartreuse bags contain 1 muted white bag, 1 vibrant bronze bag, 2 vibrant maroon bags, 4 clear lime bags.
+dotted indigo bags contain 4 pale olive bags, 1 bright violet bag, 3 drab gray bags.
+striped crimson bags contain 3 muted salmon bags.
+plaid green bags contain 3 posh tomato bags.
+dim brown bags contain 3 striped teal bags, 3 vibrant aqua bags, 3 plaid yellow bags.
+faded turquoise bags contain 2 dim blue bags, 3 clear green bags, 3 striped bronze bags, 2 dim beige bags.
+dotted coral bags contain 2 vibrant silver bags, 3 plaid crimson bags, 4 dull silver bags, 1 muted blue bag.
+mirrored magenta bags contain 3 striped teal bags, 1 mirrored black bag, 4 shiny black bags.
+shiny gray bags contain 3 bright magenta bags.
+mirrored violet bags contain 5 drab blue bags, 5 dark brown bags.
+dark beige bags contain 2 vibrant blue bags, 2 bright magenta bags, 1 dim indigo bag.
+dark bronze bags contain 3 vibrant chartreuse bags, 2 posh turquoise bags, 4 faded aqua bags.
+clear turquoise bags contain 1 mirrored green bag, 1 faded indigo bag, 4 shiny aqua bags, 4 dim tomato bags.
+dark silver bags contain 5 posh purple bags, 4 dull silver bags.
+dull tan bags contain 2 striped brown bags, 3 vibrant salmon bags, 1 drab gold bag.
+mirrored gray bags contain 2 dim white bags, 4 muted white bags, 1 muted orange bag, 3 muted magenta bags.
+faded black bags contain 3 faded aqua bags, 4 drab white bags, 2 dull lavender bags, 1 bright purple bag.
+light fuchsia bags contain 3 pale magenta bags.
+wavy lavender bags contain no other bags.
+dull black bags contain 1 mirrored teal bag.
+vibrant chartreuse bags contain 1 dull violet bag, 4 posh turquoise bags.
+posh yellow bags contain 5 wavy gold bags.
+shiny teal bags contain 2 drab salmon bags, 5 striped crimson bags.
+plaid fuchsia bags contain 3 dim brown bags, 2 posh bronze bags, 1 striped aqua bag, 1 shiny chartreuse bag.
+faded yellow bags contain 1 dotted tan bag, 3 dark coral bags.
+mirrored orange bags contain 3 pale coral bags.
+wavy indigo bags contain 5 shiny coral bags, 2 shiny yellow bags, 2 striped brown bags.
+dotted salmon bags contain 1 drab turquoise bag, 1 vibrant lime bag, 3 dull chartreuse bags, 1 vibrant maroon bag.
+dull magenta bags contain 3 shiny coral bags, 5 dull violet bags, 5 mirrored violet bags.
+shiny tomato bags contain 1 dim salmon bag, 1 dim olive bag.
+drab gold bags contain 3 drab maroon bags, 1 dotted black bag, 4 plaid orange bags.
+bright yellow bags contain 4 muted teal bags, 1 faded maroon bag, 5 posh chartreuse bags, 5 plaid indigo bags.
+dull plum bags contain 1 shiny salmon bag, 3 light tan bags.
+posh gray bags contain 3 muted lime bags, 2 dotted green bags.
+clear violet bags contain 5 vibrant maroon bags.
+dotted bronze bags contain 3 light tan bags, 4 shiny yellow bags, 3 mirrored brown bags, 1 plaid yellow bag.
+mirrored lime bags contain 2 bright teal bags, 2 dim gold bags, 2 dull tomato bags, 3 wavy green bags.
+shiny indigo bags contain 3 dull silver bags, 2 dim cyan bags, 2 striped magenta bags.
+vibrant crimson bags contain 2 light chartreuse bags.
+dim magenta bags contain 5 plaid olive bags, 2 muted green bags, 4 bright crimson bags.
+dim blue bags contain 1 bright silver bag, 2 shiny gray bags.
+plaid teal bags contain 4 shiny aqua bags, 1 dull fuchsia bag, 4 bright lime bags.
+dull teal bags contain 2 dotted black bags.
+plaid gray bags contain 5 muted brown bags.
+pale teal bags contain 5 striped olive bags, 1 dotted fuchsia bag, 3 dark teal bags, 2 dim purple bags.
+clear beige bags contain 3 pale lime bags, 4 striped aqua bags, 3 mirrored red bags.
+mirrored green bags contain 4 mirrored olive bags, 5 dim salmon bags, 4 vibrant bronze bags.
+plaid aqua bags contain 2 pale white bags, 1 dull plum bag, 4 mirrored olive bags, 3 dim maroon bags.
+pale aqua bags contain 5 bright salmon bags, 4 vibrant silver bags, 2 light orange bags.
+plaid crimson bags contain 3 striped magenta bags.
+mirrored red bags contain 5 dull coral bags, 5 pale yellow bags, 5 drab maroon bags, 2 dim gray bags.
+pale black bags contain 1 light red bag, 4 faded teal bags.
+dim turquoise bags contain 5 faded purple bags, 4 wavy fuchsia bags, 3 vibrant purple bags, 2 pale beige bags.
+dim lavender bags contain 1 light blue bag.
+pale gray bags contain 3 mirrored red bags, 5 light indigo bags.
+clear magenta bags contain 5 bright gold bags, 5 dim lavender bags, 1 wavy lavender bag.
+dull gold bags contain 4 dull fuchsia bags, 3 vibrant tan bags.
+dim salmon bags contain 5 dull yellow bags, 4 pale beige bags.
+drab magenta bags contain 2 vibrant salmon bags.
+vibrant green bags contain 3 bright purple bags, 5 wavy brown bags, 5 dotted gray bags, 1 posh bronze bag.
+dull brown bags contain 1 wavy tan bag, 1 shiny salmon bag.
+clear white bags contain 5 bright lime bags, 3 light tan bags.
+dotted lavender bags contain 5 wavy cyan bags, 2 dark indigo bags, 4 shiny gold bags.
+dotted purple bags contain 5 dull teal bags, 3 shiny plum bags.
+drab yellow bags contain 3 faded beige bags, 3 light silver bags.
+dark orange bags contain 5 bright lime bags.
+dotted cyan bags contain 1 vibrant lime bag, 1 wavy maroon bag, 2 dull tan bags, 5 shiny salmon bags.
+posh indigo bags contain 5 dull yellow bags, 1 vibrant bronze bag.
+dull chartreuse bags contain 2 wavy lavender bags, 5 vibrant blue bags.
+posh blue bags contain 3 wavy maroon bags.
+dim teal bags contain 3 muted turquoise bags, 1 vibrant black bag, 5 dotted tomato bags.
+pale purple bags contain 1 striped olive bag.
+drab chartreuse bags contain 1 clear orange bag, 2 plaid turquoise bags, 2 drab maroon bags.
+plaid white bags contain 4 plaid indigo bags, 5 vibrant lime bags.
+vibrant bronze bags contain 5 vibrant blue bags, 1 drab blue bag, 1 dull lime bag.
+bright bronze bags contain 3 muted magenta bags, 3 dotted black bags, 1 pale lime bag, 2 dull violet bags.
+dark indigo bags contain 3 bright maroon bags.
+muted lavender bags contain 1 light white bag, 2 clear white bags, 2 posh white bags, 3 dim purple bags.
+vibrant violet bags contain 5 dull magenta bags, 4 posh coral bags.
+drab beige bags contain 2 plaid magenta bags, 2 muted bronze bags, 2 muted purple bags.
+drab plum bags contain 4 mirrored tomato bags, 3 light lavender bags, 3 mirrored green bags, 5 muted salmon bags.
+mirrored fuchsia bags contain 1 mirrored tomato bag, 5 dotted black bags, 2 posh white bags.
+pale crimson bags contain 4 light plum bags.
+dotted black bags contain 3 bright maroon bags.
+wavy tomato bags contain 1 dim black bag, 5 vibrant coral bags, 1 mirrored purple bag.
+bright aqua bags contain 5 pale lime bags, 3 striped teal bags.
+vibrant purple bags contain 2 clear turquoise bags, 4 vibrant bronze bags, 1 dark lime bag, 3 clear crimson bags.
+vibrant tan bags contain 4 posh black bags.
+plaid turquoise bags contain 2 dotted violet bags, 5 mirrored plum bags.
+dim violet bags contain 3 dotted orange bags.
+bright tan bags contain 2 dark indigo bags, 4 faded purple bags, 4 dim blue bags.
+muted chartreuse bags contain 4 dotted black bags, 5 mirrored tomato bags.
+muted gold bags contain 2 wavy gray bags, 4 clear gold bags, 1 shiny gold bag.
+dull indigo bags contain 3 mirrored maroon bags.
+clear aqua bags contain 4 dim plum bags, 5 bright bronze bags.
+muted maroon bags contain 1 striped crimson bag, 3 vibrant aqua bags.
+muted blue bags contain 4 clear magenta bags, 4 pale bronze bags, 2 dull black bags, 4 striped olive bags.
+drab aqua bags contain 3 faded crimson bags.
+shiny olive bags contain 4 shiny salmon bags, 2 wavy plum bags, 4 pale bronze bags, 3 posh gold bags.
+striped bronze bags contain 4 plaid olive bags, 4 plaid indigo bags, 1 pale white bag, 3 striped magenta bags.
+mirrored gold bags contain 2 faded lavender bags.
+faded blue bags contain 1 plaid bronze bag, 3 dim olive bags, 2 wavy crimson bags, 4 plaid silver bags.
+plaid lime bags contain 2 dim yellow bags.
+mirrored brown bags contain 4 light crimson bags.
+plaid red bags contain 5 shiny aqua bags, 5 wavy lavender bags, 1 posh beige bag.
+mirrored coral bags contain 4 mirrored lime bags, 5 muted orange bags, 5 dotted salmon bags, 1 faded purple bag.
+mirrored olive bags contain 2 vibrant blue bags.
+pale orange bags contain 4 wavy lime bags.
+drab maroon bags contain 1 shiny yellow bag, 3 dull yellow bags, 1 wavy lavender bag, 2 dim salmon bags.
+drab purple bags contain 5 bright tomato bags, 4 striped bronze bags, 2 bright chartreuse bags, 2 dark violet bags.
+striped lime bags contain 5 posh turquoise bags, 1 dim purple bag.
+wavy beige bags contain 5 shiny tomato bags, 3 drab lavender bags, 1 shiny orange bag.
+bright gold bags contain 5 vibrant red bags, 1 shiny orange bag, 3 striped bronze bags.
+muted magenta bags contain 4 light olive bags, 3 dotted tan bags.
+dark lime bags contain 5 wavy lavender bags, 4 clear maroon bags, 2 striped beige bags, 4 plaid salmon bags.
+pale silver bags contain 3 faded lavender bags, 2 dotted purple bags, 3 wavy crimson bags.
+posh turquoise bags contain 5 dim yellow bags, 4 posh lime bags, 5 shiny orange bags.
+shiny coral bags contain 2 dull tomato bags.
+dim tomato bags contain 3 shiny aqua bags, 3 light cyan bags.
+plaid tomato bags contain 3 faded indigo bags.
+clear tan bags contain 3 mirrored indigo bags.
+wavy maroon bags contain 1 dark silver bag.
+drab teal bags contain 5 muted salmon bags, 4 plaid yellow bags, 4 bright red bags, 2 posh teal bags.
+dim plum bags contain 5 posh salmon bags, 5 faded purple bags, 2 posh brown bags.
+bright fuchsia bags contain 2 dark beige bags, 3 faded yellow bags.
+clear silver bags contain 2 plaid tomato bags, 4 muted chartreuse bags.
+shiny purple bags contain 5 muted lavender bags, 2 clear turquoise bags, 4 muted teal bags.
+dark red bags contain 3 plaid plum bags, 2 dim indigo bags, 2 wavy gray bags.
+dark white bags contain 4 muted bronze bags, 5 mirrored gold bags, 3 plaid lavender bags.
+drab silver bags contain 1 dark gold bag, 3 muted white bags.
+dark green bags contain 3 posh turquoise bags.
+striped white bags contain 1 vibrant maroon bag, 1 shiny salmon bag.
+striped lavender bags contain 1 light tomato bag, 5 light lime bags, 1 posh gold bag.
+mirrored tan bags contain 2 posh fuchsia bags.
+pale salmon bags contain 4 shiny blue bags.
+dark black bags contain 1 dotted coral bag, 1 faded crimson bag, 4 drab violet bags, 5 clear chartreuse bags.
+vibrant red bags contain 1 dim gold bag, 2 dull yellow bags, 1 faded brown bag, 4 light cyan bags.
+pale turquoise bags contain 5 clear cyan bags.
+bright olive bags contain 1 clear turquoise bag, 4 bright teal bags, 3 striped maroon bags, 1 striped gold bag.
+shiny green bags contain 5 dim lime bags, 3 wavy brown bags, 2 faded magenta bags, 5 drab maroon bags.
+vibrant tomato bags contain 3 striped plum bags, 2 vibrant maroon bags, 4 muted silver bags, 3 striped chartreuse bags.
+vibrant yellow bags contain 3 pale beige bags, 4 dim orange bags, 4 dotted cyan bags.
+muted aqua bags contain 3 vibrant purple bags.
+dull orange bags contain 2 striped gray bags, 3 vibrant bronze bags, 2 bright turquoise bags.
+wavy cyan bags contain 2 drab maroon bags, 4 shiny aqua bags, 5 clear lime bags.
+faded tan bags contain 3 muted turquoise bags, 2 plaid purple bags, 3 clear crimson bags.
+light maroon bags contain 5 wavy chartreuse bags, 3 mirrored silver bags, 5 muted plum bags, 2 mirrored blue bags.
+shiny lavender bags contain 1 dark silver bag, 5 clear teal bags, 5 dark red bags, 4 faded red bags.
+striped fuchsia bags contain 4 clear gold bags, 3 bright magenta bags, 3 bright aqua bags.
+striped plum bags contain 4 bright lime bags, 5 dotted black bags, 5 drab beige bags.
+dotted red bags contain 4 dim gold bags, 3 dim indigo bags, 4 striped olive bags, 5 dim white bags.
+mirrored chartreuse bags contain 5 posh tomato bags.
+dim white bags contain 5 clear maroon bags.
+muted black bags contain 2 posh turquoise bags, 3 clear lavender bags, 2 shiny aqua bags, 2 pale red bags.
+muted silver bags contain 4 striped white bags, 5 dotted tomato bags, 4 mirrored fuchsia bags, 2 clear maroon bags.
+dotted lime bags contain 1 muted aqua bag, 3 mirrored tan bags.
+faded chartreuse bags contain 4 vibrant violet bags, 5 faded magenta bags, 5 dim teal bags, 2 dim green bags.
+light turquoise bags contain 1 dotted purple bag.
+plaid cyan bags contain 1 bright magenta bag, 2 wavy chartreuse bags, 5 vibrant silver bags, 3 pale crimson bags.
+dull maroon bags contain 5 dim black bags.
+wavy violet bags contain 1 faded yellow bag.
+vibrant teal bags contain 5 dim lime bags, 2 vibrant gold bags, 2 dim beige bags.
+pale fuchsia bags contain 3 striped olive bags.
+light brown bags contain 3 shiny chartreuse bags, 2 wavy purple bags.
+dull green bags contain 3 striped orange bags, 2 posh indigo bags, 3 faded blue bags.
+dark blue bags contain 5 striped magenta bags, 3 striped gray bags, 4 pale coral bags.
+mirrored lavender bags contain 3 posh black bags.
+shiny brown bags contain 5 dotted magenta bags, 4 dim chartreuse bags, 1 posh cyan bag.
+muted brown bags contain 3 dull black bags, 3 pale maroon bags, 5 posh brown bags, 2 striped gray bags.
+faded orange bags contain 1 dark orange bag.
+muted fuchsia bags contain 3 plaid salmon bags.
+clear plum bags contain 3 shiny red bags, 4 dim silver bags.
+bright coral bags contain 4 pale yellow bags, 2 muted magenta bags, 2 bright chartreuse bags, 3 light olive bags.
+muted coral bags contain 4 striped green bags.
+drab olive bags contain 3 shiny salmon bags, 4 clear cyan bags.
+dim silver bags contain 2 shiny plum bags.
+wavy plum bags contain 3 mirrored fuchsia bags, 5 pale maroon bags, 5 posh salmon bags.
+plaid coral bags contain 1 mirrored gold bag.
+posh beige bags contain 3 mirrored maroon bags, 3 drab chartreuse bags, 3 dark salmon bags, 1 clear green bag.
+drab green bags contain 1 bright teal bag, 3 muted chartreuse bags.
+bright crimson bags contain 3 striped orange bags, 4 wavy plum bags.
+posh chartreuse bags contain 5 clear white bags, 3 light red bags.
+dim gray bags contain 1 mirrored fuchsia bag, 3 muted teal bags, 4 clear maroon bags, 5 striped white bags.
+striped brown bags contain 2 muted orange bags.
+dim tan bags contain 3 clear gold bags, 5 clear salmon bags, 2 dark chartreuse bags.
+striped magenta bags contain 2 plaid indigo bags, 5 drab lavender bags, 2 dotted fuchsia bags, 4 shiny aqua bags.
+dotted violet bags contain 3 dull tomato bags.
+dotted tan bags contain 1 dark orange bag, 2 drab blue bags.
+shiny beige bags contain 1 drab gold bag.
+light plum bags contain 5 plaid tomato bags, 5 wavy gray bags, 1 dull tomato bag.
+muted indigo bags contain 3 dim salmon bags.
+clear red bags contain 3 mirrored beige bags.
+mirrored silver bags contain 2 wavy plum bags, 4 vibrant magenta bags.
+dark lavender bags contain 2 wavy violet bags, 5 muted green bags, 2 dim purple bags.
+clear teal bags contain 4 wavy crimson bags.
+light purple bags contain 5 faded black bags.
+light salmon bags contain 3 vibrant beige bags, 3 striped white bags, 5 pale magenta bags, 5 muted blue bags.
+dull gray bags contain 5 dim lavender bags.
+posh aqua bags contain 1 light olive bag, 4 mirrored purple bags, 4 vibrant gold bags, 1 shiny aqua bag.
+pale chartreuse bags contain 5 faded indigo bags.
+striped cyan bags contain 1 shiny olive bag, 3 bright tomato bags, 1 faded beige bag.
+clear coral bags contain 5 clear violet bags, 1 plaid tomato bag.
+bright cyan bags contain 3 mirrored violet bags, 5 plaid magenta bags, 4 vibrant bronze bags.
+posh tomato bags contain 3 shiny aqua bags, 1 pale beige bag.
+bright lavender bags contain 4 clear beige bags, 2 faded lavender bags, 3 faded aqua bags, 5 pale purple bags.
+dotted teal bags contain 5 plaid salmon bags, 1 posh turquoise bag, 2 muted silver bags.
+clear tomato bags contain 5 bright indigo bags.
+dotted silver bags contain 2 mirrored indigo bags.
+plaid plum bags contain 4 light crimson bags.
+wavy magenta bags contain 2 posh indigo bags, 2 vibrant indigo bags.
+dull tomato bags contain 4 dull lime bags, 4 faded brown bags.
+vibrant black bags contain 5 light crimson bags, 5 pale lavender bags, 3 dull blue bags, 2 pale coral bags.
+pale bronze bags contain 3 vibrant violet bags.
+wavy lime bags contain 5 shiny yellow bags, 2 pale white bags, 1 clear gold bag, 5 mirrored chartreuse bags.
+striped gray bags contain 3 shiny tomato bags, 3 dull coral bags, 1 shiny aqua bag, 2 dark orange bags.
+faded crimson bags contain 4 pale white bags, 3 muted bronze bags, 2 posh blue bags, 3 bright coral bags.
+wavy orange bags contain 2 shiny indigo bags.
+dotted white bags contain 1 striped tan bag, 4 bright silver bags, 1 shiny fuchsia bag, 3 posh gray bags.
+posh bronze bags contain 4 muted silver bags, 1 light lavender bag.
+dotted magenta bags contain 5 clear fuchsia bags, 4 faded indigo bags, 3 dull turquoise bags, 4 muted orange bags.
+dull cyan bags contain 3 clear teal bags, 3 dim white bags, 3 dull tomato bags, 5 vibrant purple bags.
+clear gold bags contain 4 dim gold bags, 3 dull lime bags, 4 faded brown bags, 4 wavy gray bags.
+bright beige bags contain 3 dull cyan bags, 4 bright indigo bags, 2 dull lime bags.
+clear orange bags contain 5 shiny salmon bags.
+plaid silver bags contain 5 dotted purple bags, 1 dim maroon bag, 3 muted gold bags.
+shiny white bags contain 1 light brown bag, 1 mirrored lime bag.
+dark gray bags contain 5 shiny cyan bags, 2 drab tomato bags.
+drab white bags contain 4 shiny tomato bags, 3 shiny gold bags, 3 dull lime bags, 3 plaid orange bags.
+vibrant cyan bags contain 2 wavy purple bags, 4 light gold bags, 1 pale indigo bag, 2 striped fuchsia bags.
+shiny yellow bags contain 4 shiny aqua bags, 2 dim salmon bags, 3 posh tomato bags, 5 muted salmon bags.
+posh coral bags contain 2 striped gray bags, 4 dark orange bags, 5 posh magenta bags.
+clear salmon bags contain 4 posh yellow bags, 2 pale violet bags, 3 mirrored violet bags.
+posh olive bags contain 2 mirrored red bags, 3 faded gold bags.
+faded fuchsia bags contain 5 bright gold bags, 3 pale tomato bags, 2 dotted bronze bags, 1 mirrored green bag.
+striped maroon bags contain 4 posh maroon bags, 4 dim indigo bags, 5 shiny aqua bags, 4 posh lime bags.
+dark violet bags contain 5 plaid tomato bags, 3 bright lime bags, 4 light lavender bags, 4 dark brown bags.
+dim maroon bags contain 1 dark beige bag, 4 wavy gray bags, 5 shiny coral bags, 1 pale white bag.
+wavy crimson bags contain 1 light tan bag, 5 dark beige bags.
+plaid magenta bags contain 1 shiny turquoise bag, 1 dark lime bag, 5 dim salmon bags.
+clear indigo bags contain 4 muted maroon bags.
+clear olive bags contain 5 mirrored teal bags, 1 plaid lime bag, 3 dull magenta bags, 5 wavy gray bags.
+mirrored white bags contain 3 pale gold bags.
+wavy blue bags contain 1 dotted aqua bag, 5 dark green bags.
+faded cyan bags contain 4 wavy gray bags, 5 vibrant bronze bags, 1 mirrored olive bag, 3 drab blue bags.
+faded gray bags contain 2 drab brown bags, 4 dotted coral bags, 5 dim turquoise bags, 1 mirrored maroon bag.
+dim coral bags contain 5 shiny olive bags, 3 light plum bags.
+vibrant fuchsia bags contain 5 shiny chartreuse bags, 5 wavy bronze bags, 2 bright red bags.
+dotted tomato bags contain 5 faded indigo bags, 3 vibrant maroon bags, 4 shiny coral bags.
+faded salmon bags contain 3 dull silver bags, 2 wavy bronze bags, 2 drab teal bags.
+vibrant orange bags contain 1 dotted beige bag.
+muted violet bags contain 5 posh lime bags.
+striped tan bags contain 3 muted lime bags.
+drab violet bags contain 3 vibrant chartreuse bags, 5 posh turquoise bags, 1 bright cyan bag.
+bright purple bags contain 2 vibrant bronze bags, 3 wavy beige bags, 2 plaid bronze bags.
+vibrant maroon bags contain no other bags.
+muted teal bags contain 2 bright turquoise bags.
+bright plum bags contain 5 dark gold bags, 2 shiny turquoise bags, 1 dull yellow bag.
+shiny crimson bags contain 3 wavy magenta bags.
+wavy teal bags contain 5 faded indigo bags, 4 dotted gray bags, 3 pale chartreuse bags, 3 vibrant coral bags.
+shiny blue bags contain 2 shiny salmon bags, 4 light tan bags, 1 dim salmon bag.
+mirrored maroon bags contain 1 drab fuchsia bag, 3 dotted green bags, 3 muted white bags.
+clear maroon bags contain 2 vibrant red bags, 5 bright maroon bags, 4 light olive bags.
+bright salmon bags contain 1 dotted red bag, 4 vibrant beige bags, 3 dark maroon bags, 3 clear lavender bags.
+pale gold bags contain 3 plaid olive bags.
+faded lime bags contain 3 faded maroon bags, 5 mirrored aqua bags.
+faded magenta bags contain 4 plaid orange bags, 5 vibrant violet bags, 1 dotted green bag, 3 wavy crimson bags.
+wavy aqua bags contain 5 drab yellow bags, 5 posh bronze bags.
+faded brown bags contain 3 mirrored green bags, 5 dim salmon bags, 4 vibrant blue bags, 1 wavy gray bag.
+dark purple bags contain 4 pale beige bags, 3 drab lavender bags.
+dull lime bags contain no other bags.
+light orange bags contain 1 vibrant white bag, 1 striped magenta bag.
+mirrored plum bags contain 1 clear green bag, 4 faded blue bags.
+vibrant brown bags contain 4 dark crimson bags, 5 light plum bags.
+shiny turquoise bags contain 1 dark lime bag.
+dark plum bags contain 2 wavy coral bags, 2 striped gray bags, 4 muted blue bags, 2 dull aqua bags.
+shiny red bags contain 1 plaid gray bag, 4 wavy beige bags, 5 dark red bags.
+posh violet bags contain 5 striped chartreuse bags, 2 pale maroon bags, 1 dull lime bag.
+light silver bags contain 2 clear silver bags, 1 dark indigo bag, 2 dim salmon bags, 2 drab salmon bags.
+plaid orange bags contain 4 dim gold bags, 2 bright magenta bags, 4 drab lavender bags.
+vibrant silver bags contain 5 posh plum bags, 3 vibrant aqua bags, 2 light lavender bags.
+faded tomato bags contain 1 pale coral bag, 2 posh gold bags.
+shiny silver bags contain 4 faded orange bags, 1 striped white bag, 2 faded turquoise bags, 5 striped gray bags.
+plaid purple bags contain 2 posh olive bags, 3 pale maroon bags, 3 pale gold bags, 1 faded white bag.
+light tomato bags contain 2 vibrant indigo bags, 4 dark orange bags, 5 muted bronze bags, 4 plaid tomato bags.
+dull aqua bags contain 5 bright lime bags.
+drab red bags contain 5 posh teal bags.
+dotted gray bags contain 2 vibrant salmon bags, 4 mirrored chartreuse bags, 1 dotted tomato bag, 4 posh magenta bags.
+dull bronze bags contain 3 mirrored brown bags.
+shiny aqua bags contain no other bags.
+dim gold bags contain no other bags.
+pale blue bags contain 4 posh gray bags.
+faded purple bags contain 5 shiny blue bags, 5 plaid salmon bags, 4 pale tomato bags, 2 dark gold bags.
+striped teal bags contain 4 mirrored green bags.
+shiny orange bags contain 4 faded lavender bags, 2 muted salmon bags, 2 dim indigo bags.
+wavy yellow bags contain 5 clear silver bags, 2 shiny brown bags.
+vibrant turquoise bags contain 1 vibrant magenta bag, 4 dull fuchsia bags, 5 mirrored green bags.
+dark teal bags contain 5 dim tomato bags.
+posh brown bags contain 3 dark orange bags.
+vibrant gray bags contain 2 dark beige bags, 2 wavy teal bags, 3 light purple bags.
+drab black bags contain 1 mirrored maroon bag, 3 pale silver bags, 3 dark brown bags, 1 shiny gray bag.
+light blue bags contain 2 dim olive bags, 2 striped magenta bags.
+muted turquoise bags contain 3 dim lime bags, 3 shiny coral bags.
+faded red bags contain 5 clear gray bags.
+bright chartreuse bags contain 4 plaid teal bags, 5 drab salmon bags, 5 wavy cyan bags.
+light magenta bags contain 5 light aqua bags, 4 light crimson bags, 3 dark yellow bags, 1 light tomato bag.
+striped coral bags contain 3 mirrored white bags.
+shiny maroon bags contain 1 vibrant red bag, 3 bright red bags.
+striped yellow bags contain 1 bright orange bag, 2 faded plum bags, 3 light olive bags, 3 shiny aqua bags.
+dull olive bags contain 2 posh fuchsia bags, 2 dull coral bags, 2 faded red bags.
+dotted yellow bags contain 1 drab salmon bag, 3 pale fuchsia bags.
+light bronze bags contain 3 drab cyan bags, 5 mirrored orange bags, 4 plaid crimson bags.
+shiny chartreuse bags contain 1 wavy cyan bag, 4 shiny tomato bags.
+dull yellow bags contain no other bags.
+faded plum bags contain 5 vibrant blue bags, 5 clear indigo bags, 5 posh teal bags, 4 posh plum bags.
+wavy salmon bags contain 4 striped teal bags, 3 wavy tan bags, 1 clear white bag.
+posh salmon bags contain 4 dull chartreuse bags, 4 shiny yellow bags, 2 dotted black bags, 3 clear lime bags.
+dull white bags contain 2 dim olive bags, 4 vibrant bronze bags, 4 faded cyan bags.
+shiny gold bags contain 5 bright maroon bags, 5 shiny aqua bags, 2 clear lime bags, 2 muted white bags.
+posh plum bags contain 4 posh purple bags, 2 wavy beige bags, 5 plaid plum bags.
+shiny magenta bags contain 4 shiny tan bags, 2 dull green bags, 3 mirrored purple bags.
+wavy olive bags contain 4 vibrant olive bags, 2 clear fuchsia bags, 1 light plum bag, 2 dark violet bags.
+muted lime bags contain 4 posh white bags, 4 shiny tomato bags.
+light indigo bags contain 2 clear turquoise bags, 3 vibrant black bags, 3 striped lime bags.
+muted yellow bags contain 3 mirrored tomato bags.
+faded beige bags contain 5 clear red bags, 3 dull brown bags, 4 dark red bags, 1 vibrant magenta bag.
+striped turquoise bags contain 2 bright aqua bags, 5 dim cyan bags, 1 pale lavender bag.
+pale beige bags contain no other bags.
+dull silver bags contain 3 bright lime bags, 2 pale tomato bags, 3 mirrored green bags.
+clear cyan bags contain 1 vibrant blue bag, 2 faded cyan bags, 1 faded brown bag.
+posh green bags contain 2 vibrant gray bags, 1 pale magenta bag.
+muted beige bags contain 2 drab blue bags, 3 vibrant magenta bags, 5 pale tomato bags.
+bright silver bags contain 4 dull brown bags, 4 vibrant violet bags, 4 dim violet bags.
+mirrored bronze bags contain 2 bright indigo bags, 3 shiny coral bags.
+dull red bags contain 4 dull plum bags, 1 striped black bag, 1 dim teal bag, 4 dim white bags.
+dim chartreuse bags contain 3 drab maroon bags.
+drab crimson bags contain 5 dull turquoise bags, 3 posh gold bags, 4 bright gold bags, 2 muted indigo bags.
+wavy brown bags contain 1 muted white bag.
+plaid violet bags contain 2 faded tomato bags.
+muted salmon bags contain 1 light cyan bag, 1 vibrant blue bag.
+mirrored salmon bags contain 1 dotted green bag, 2 plaid salmon bags.
+posh lime bags contain 1 vibrant blue bag.
+shiny tan bags contain 2 bright red bags, 1 dim maroon bag, 3 vibrant salmon bags.
+vibrant aqua bags contain 5 shiny orange bags, 2 dull coral bags, 4 vibrant bronze bags, 5 dark indigo bags.
+posh magenta bags contain 5 dim maroon bags, 2 wavy indigo bags.
+posh red bags contain 4 dull black bags, 2 shiny tomato bags, 4 faded beige bags.
+mirrored indigo bags contain 4 faded magenta bags, 1 light red bag, 3 muted gray bags, 2 plaid lavender bags.
+drab indigo bags contain 4 dull tan bags, 2 dark coral bags.
+vibrant lavender bags contain 5 posh turquoise bags, 4 posh bronze bags, 5 light tomato bags.
+mirrored blue bags contain 1 striped bronze bag, 4 plaid salmon bags, 3 posh lime bags, 4 mirrored green bags.
+plaid blue bags contain 4 bright violet bags, 5 clear red bags.
+dark tan bags contain 3 faded chartreuse bags, 1 posh gold bag, 5 light chartreuse bags.
+bright teal bags contain 3 pale yellow bags, 1 vibrant white bag, 3 shiny salmon bags, 1 plaid indigo bag.
+dark gold bags contain 1 mirrored green bag.
+plaid beige bags contain 5 dim cyan bags.
+pale plum bags contain 4 striped olive bags, 1 mirrored violet bag.
+drab orange bags contain 1 plaid cyan bag, 2 vibrant green bags, 4 striped crimson bags, 2 posh teal bags.
+faded teal bags contain 4 muted salmon bags, 1 dim tomato bag, 5 clear white bags.
+posh cyan bags contain 3 shiny gray bags, 2 posh indigo bags.
+plaid tan bags contain 4 plaid silver bags, 2 dark beige bags, 3 plaid salmon bags, 5 light beige bags.
+muted olive bags contain 5 vibrant salmon bags, 2 dull orange bags.
+muted tan bags contain 5 wavy gold bags, 2 striped orange bags, 4 plaid lavender bags.
+posh tan bags contain 3 shiny lavender bags, 5 vibrant red bags, 4 light bronze bags.
+bright tomato bags contain 3 dull lime bags, 3 wavy gray bags.
+dark turquoise bags contain 3 vibrant coral bags, 4 wavy beige bags.
+faded indigo bags contain 4 wavy gray bags.
+clear blue bags contain 2 pale yellow bags.
+light gold bags contain 5 light olive bags, 4 clear white bags, 3 plaid silver bags, 2 bright maroon bags.
+light lavender bags contain 2 dotted black bags, 4 plaid tomato bags, 4 dark orange bags, 5 shiny blue bags.
+faded coral bags contain 5 pale gold bags, 4 dull black bags.
+vibrant salmon bags contain 2 faded teal bags, 4 drab lavender bags, 5 clear teal bags, 1 dim olive bag.
+muted orange bags contain 1 posh salmon bag, 2 light cyan bags, 5 shiny tomato bags, 4 dim olive bags.
+clear black bags contain 3 wavy bronze bags, 4 wavy lime bags, 4 shiny black bags.
+pale violet bags contain 1 faded violet bag, 3 pale chartreuse bags, 5 drab blue bags.
+dotted plum bags contain 2 muted chartreuse bags, 3 vibrant turquoise bags, 5 posh brown bags.
+plaid maroon bags contain 1 posh coral bag, 1 dull fuchsia bag.
+dotted brown bags contain 1 posh lime bag, 5 dull turquoise bags.
+pale green bags contain 3 drab magenta bags, 4 dim salmon bags, 1 vibrant chartreuse bag.
+dark tomato bags contain 2 clear indigo bags, 1 light plum bag, 2 dull turquoise bags.
+striped silver bags contain 5 dark red bags, 4 faded purple bags.
+shiny fuchsia bags contain 2 dark gold bags, 3 dull tomato bags.
+mirrored aqua bags contain 5 dark bronze bags.
+dim beige bags contain 5 dull white bags.
+dark chartreuse bags contain 4 light crimson bags, 3 dim salmon bags, 2 dark orange bags.
+plaid chartreuse bags contain 4 drab blue bags.
+dim green bags contain 4 muted bronze bags, 1 shiny indigo bag.
+mirrored crimson bags contain 5 wavy fuchsia bags, 2 vibrant magenta bags.
+clear yellow bags contain 3 plaid bronze bags, 1 light tan bag.
+bright turquoise bags contain 3 shiny salmon bags.
+drab brown bags contain 1 vibrant fuchsia bag.
+dim bronze bags contain 2 dim aqua bags, 4 dim beige bags.
+dim black bags contain 1 posh purple bag, 4 mirrored bronze bags, 5 posh plum bags.
+plaid gold bags contain 4 posh silver bags, 5 light turquoise bags, 3 vibrant black bags.
+drab lime bags contain 1 muted gold bag, 4 dotted red bags.
+bright red bags contain 1 dull yellow bag, 4 mirrored gold bags.
+vibrant white bags contain 2 dull lime bags, 2 faded indigo bags, 1 faded brown bag, 1 muted salmon bag.
+drab fuchsia bags contain 3 pale beige bags, 3 dark orange bags.
+striped tomato bags contain 1 dark lime bag, 5 dull coral bags.
+faded green bags contain 2 wavy blue bags.
+vibrant olive bags contain 3 bright tomato bags, 4 wavy beige bags.
+dark coral bags contain 5 faded teal bags, 1 mirrored tomato bag, 3 dark orange bags, 5 plaid lime bags.
+bright violet bags contain 4 dark lime bags.
+wavy tan bags contain 4 light tan bags, 3 vibrant red bags, 2 mirrored olive bags.
+dotted beige bags contain 5 striped gray bags, 4 posh plum bags, 1 bright turquoise bag, 4 striped fuchsia bags.
+dotted turquoise bags contain 3 mirrored green bags, 4 posh gold bags, 5 drab plum bags.
+striped beige bags contain 1 clear gold bag, 1 vibrant white bag, 3 faded cyan bags, 2 shiny gold bags.
+posh silver bags contain 2 vibrant gold bags, 2 mirrored violet bags.
+mirrored purple bags contain 2 dim yellow bags, 2 dull tomato bags.
+shiny lime bags contain 4 clear olive bags, 4 mirrored silver bags, 1 muted tomato bag.
+muted cyan bags contain 1 posh coral bag, 5 drab blue bags, 4 wavy lavender bags.
+light aqua bags contain 1 dark orange bag.
+shiny cyan bags contain 2 dark maroon bags, 5 shiny salmon bags, 5 muted salmon bags, 2 wavy bronze bags.
+posh white bags contain 1 posh fuchsia bag.
+vibrant plum bags contain 4 light crimson bags.
+dotted blue bags contain 1 shiny tan bag, 3 light plum bags, 5 dotted gray bags.
+posh maroon bags contain 5 mirrored violet bags.
+dull violet bags contain 1 faded teal bag, 2 wavy cyan bags, 3 dull silver bags, 3 vibrant red bags.
+posh gold bags contain 4 muted salmon bags, 4 dull plum bags, 3 muted bronze bags.
+dim orange bags contain 2 dull coral bags.
+dim aqua bags contain 1 drab maroon bag.
+striped salmon bags contain 4 muted white bags.
+dark cyan bags contain 3 plaid maroon bags.
+wavy red bags contain 2 wavy maroon bags, 2 vibrant chartreuse bags, 5 wavy salmon bags.
+light yellow bags contain 4 posh lime bags, 1 light white bag.
+striped blue bags contain 5 plaid magenta bags, 5 vibrant gold bags.
+dark olive bags contain 4 dim maroon bags, 2 shiny tan bags, 5 wavy green bags.
+vibrant gold bags contain 1 dull beige bag, 4 posh turquoise bags.
+muted white bags contain 1 dim indigo bag, 5 dull lime bags, 5 shiny aqua bags.
+light violet bags contain 5 wavy bronze bags.
+pale olive bags contain 1 dim gold bag, 2 shiny coral bags.
+light gray bags contain 3 bright gold bags.
+dim indigo bags contain 3 posh tomato bags, 5 pale tomato bags, 4 shiny aqua bags.
+pale indigo bags contain 4 pale bronze bags, 5 light chartreuse bags.
+muted red bags contain 3 clear white bags, 4 dull lavender bags, 5 muted purple bags.
+plaid olive bags contain 3 dark orange bags, 3 dim gold bags.
+dotted maroon bags contain 3 faded purple bags, 5 light green bags.
+bright orange bags contain 1 shiny black bag, 2 dim lavender bags, 1 shiny olive bag.
+wavy chartreuse bags contain 3 clear lime bags, 4 pale maroon bags.
+mirrored turquoise bags contain 2 striped crimson bags, 4 vibrant bronze bags, 5 dotted lavender bags, 2 clear silver bags.
+dull purple bags contain 4 posh crimson bags.
+faded bronze bags contain 1 clear fuchsia bag, 2 light fuchsia bags, 2 pale chartreuse bags.
+clear bronze bags contain 3 pale chartreuse bags, 5 dull tan bags, 1 vibrant tan bag.
+vibrant magenta bags contain 4 shiny fuchsia bags, 2 shiny coral bags, 3 faded indigo bags, 4 pale tomato bags.
+striped chartreuse bags contain 2 shiny orange bags, 3 mirrored tomato bags, 1 clear lime bag.
+dotted green bags contain 1 pale beige bag, 2 mirrored bronze bags, 2 wavy crimson bags.
+wavy white bags contain 3 posh magenta bags, 3 muted yellow bags, 3 wavy crimson bags, 4 vibrant olive bags.
+muted plum bags contain 4 wavy gold bags.
+faded violet bags contain 3 dark violet bags.
+dull fuchsia bags contain 4 plaid indigo bags, 1 mirrored brown bag, 5 clear lime bags.
+bright green bags contain 3 mirrored white bags, 5 dotted silver bags.
+shiny violet bags contain 4 striped salmon bags.
+dim fuchsia bags contain 3 striped red bags.
+faded lavender bags contain 3 wavy tan bags, 2 clear lime bags.
+dim cyan bags contain 4 drab white bags.
+dark brown bags contain 5 clear gold bags, 3 vibrant blue bags.
+clear lavender bags contain 5 striped turquoise bags, 1 light crimson bag, 5 light tan bags, 2 muted gold bags.
+light green bags contain 3 striped silver bags, 4 bright silver bags, 2 light crimson bags.
+pale lavender bags contain 5 clear violet bags.
+dotted orange bags contain 3 dotted tomato bags, 2 dull plum bags, 5 posh purple bags, 2 drab turquoise bags.
+bright black bags contain 3 posh chartreuse bags, 5 wavy indigo bags, 5 dull crimson bags, 2 clear turquoise bags.
+dotted gold bags contain 5 striped white bags, 2 striped brown bags, 3 mirrored green bags, 3 dark violet bags.
+plaid brown bags contain 3 striped chartreuse bags, 3 striped black bags, 2 bright chartreuse bags.
+wavy coral bags contain 3 dim turquoise bags, 4 dim lime bags.
+pale brown bags contain 4 dim white bags, 5 bright fuchsia bags, 2 clear orange bags.
+mirrored teal bags contain 4 pale lavender bags, 5 vibrant maroon bags, 4 striped gray bags, 4 vibrant indigo bags.
+posh orange bags contain 5 posh magenta bags, 4 posh violet bags, 2 plaid magenta bags, 4 muted cyan bags.
+dim crimson bags contain 3 drab violet bags, 1 dotted aqua bag.
+muted gray bags contain 4 vibrant lime bags, 1 dark maroon bag, 2 clear gold bags, 3 plaid gray bags.
+clear brown bags contain 5 shiny tomato bags, 4 striped tan bags, 5 vibrant lavender bags, 1 pale white bag.
+posh crimson bags contain 3 dim yellow bags, 4 shiny turquoise bags, 2 vibrant purple bags, 4 mirrored aqua bags.
+plaid black bags contain 2 shiny tan bags, 1 pale olive bag, 2 wavy tan bags, 1 clear red bag.
+dark crimson bags contain 3 drab fuchsia bags, 5 faded gold bags.
+pale tan bags contain 5 posh black bags.
+wavy bronze bags contain 1 clear lime bag.
+wavy gold bags contain 2 dull lavender bags, 1 bright turquoise bag, 4 striped brown bags, 5 drab turquoise bags.
+pale lime bags contain 2 faded cyan bags, 4 muted salmon bags, 4 shiny coral bags, 3 mirrored green bags.
+dark magenta bags contain 4 faded chartreuse bags, 1 muted brown bag, 4 vibrant salmon bags, 2 dim indigo bags.
+striped purple bags contain 3 mirrored olive bags.
+dull crimson bags contain 2 clear orange bags.
+dull beige bags contain 1 drab turquoise bag, 1 dark indigo bag, 1 dull white bag.
+dotted aqua bags contain 4 dull chartreuse bags.
+clear purple bags contain 2 muted beige bags, 3 dull black bags.
+light crimson bags contain 1 faded brown bag, 1 vibrant red bag, 4 wavy lavender bags, 1 wavy gray bag.
+clear fuchsia bags contain 1 dark maroon bag, 3 muted salmon bags.
+muted crimson bags contain 5 light lime bags, 4 posh plum bags, 5 clear fuchsia bags, 1 wavy turquoise bag.
+muted purple bags contain 3 dull gray bags, 5 posh gray bags.
+shiny salmon bags contain 5 faded brown bags, 4 clear chartreuse bags.
+plaid lavender bags contain 1 dim lime bag.
+vibrant indigo bags contain 5 dim tomato bags, 2 striped beige bags, 2 mirrored olive bags.
+mirrored cyan bags contain 3 plaid coral bags, 5 faded teal bags, 5 pale indigo bags, 3 bright fuchsia bags.
+dim yellow bags contain 5 light crimson bags, 1 pale tomato bag.
+dotted chartreuse bags contain 3 shiny blue bags.
+light beige bags contain 3 bright teal bags, 1 pale tomato bag, 2 light blue bags.
+dotted olive bags contain 3 bright indigo bags, 4 muted fuchsia bags.
+pale white bags contain 1 vibrant maroon bag, 2 pale tomato bags, 2 bright magenta bags.
+mirrored yellow bags contain 2 drab brown bags, 3 striped salmon bags, 4 clear olive bags, 1 dotted black bag.
+light olive bags contain 2 bright magenta bags.
+muted tomato bags contain 4 shiny lavender bags.
+light chartreuse bags contain 5 light plum bags, 4 light olive bags, 3 dark indigo bags.
+posh purple bags contain 2 wavy crimson bags.
+bright maroon bags contain 4 faded indigo bags.
+dull blue bags contain 3 dark brown bags, 3 dim indigo bags, 5 pale silver bags, 1 mirrored brown bag.
+light coral bags contain 5 clear teal bags.
+bright gray bags contain 3 muted black bags, 3 vibrant cyan bags.
+posh fuchsia bags contain 3 clear gold bags, 1 dim salmon bag, 2 shiny salmon bags.
+light white bags contain 3 dim cyan bags, 5 clear crimson bags, 3 dull fuchsia bags.
+light teal bags contain 3 shiny fuchsia bags, 2 muted white bags, 3 shiny black bags.
+plaid salmon bags contain 2 dotted black bags, 2 dark beige bags, 1 shiny coral bag.
+wavy black bags contain 5 posh olive bags.
+drab gray bags contain 3 mirrored tomato bags, 3 light crimson bags.
+dim olive bags contain 5 clear chartreuse bags.
+bright white bags contain 2 mirrored tan bags, 1 pale green bag, 5 dull magenta bags, 5 plaid lime bags.
+striped olive bags contain 3 muted gold bags.
+faded olive bags contain 1 muted indigo bag.
+pale yellow bags contain 5 light olive bags, 5 plaid aqua bags, 1 clear white bag, 5 faded purple bags.
+dull coral bags contain 4 light crimson bags, 5 shiny aqua bags, 5 wavy cyan bags, 3 dark beige bags.
+vibrant beige bags contain 4 striped olive bags, 5 clear gold bags.
+dark fuchsia bags contain 1 pale teal bag, 4 dull gray bags.
+drab tomato bags contain 4 mirrored white bags.
+clear crimson bags contain 4 pale tomato bags, 3 wavy gray bags, 4 drab blue bags, 1 mirrored olive bag.
+dotted crimson bags contain 1 plaid crimson bag, 1 dark crimson bag, 1 striped beige bag, 4 pale fuchsia bags.
+striped black bags contain 4 muted maroon bags.
+shiny bronze bags contain 1 dotted tan bag, 1 vibrant beige bag, 5 faded tomato bags.
+light cyan bags contain no other bags.
+posh black bags contain 2 dim green bags.
+striped gold bags contain 3 drab tan bags.
+faded white bags contain 4 pale coral bags.
+drab tan bags contain 4 clear gold bags, 5 drab silver bags.
+light tan bags contain 2 dull lime bags, 1 muted salmon bag, 4 pale beige bags.
+plaid indigo bags contain 3 plaid salmon bags, 1 vibrant maroon bag.
+faded gold bags contain 3 dark coral bags.
+dark salmon bags contain 5 bright gold bags, 1 pale white bag.
+plaid bronze bags contain 3 drab gold bags, 4 dotted black bags.
+shiny black bags contain 3 bright magenta bags, 2 dark indigo bags, 1 posh plum bag, 5 drab gold bags.
+pale magenta bags contain 1 clear gold bag, 5 posh fuchsia bags, 2 faded cyan bags.
--- a/2020/solutions/7/python/main.py
+++ b/2020/solutions/7/python/main.py
@@ -0,0 +1,70 @@
+from os.path import join, dirname
+from typing import Dict, List, Set, Tuple
+import re
+
+TRules = Dict[str, Dict[str, int]]
+
+
+def split_trim(input: str, split: str) -> List[str]:
+    return list(map(lambda s: s.strip(), input.split(split)))
+
+
+def extract_inner(input: str) -> Tuple[int, str]:
+    parts = input.split(' ')
+    amount = int(parts[0])
+    color = ' '.join(parts[1:-1])
+    return amount, color
+
+
+def parse_rules(rules: str) -> TRules:
+    d: TRules = {}
+    for rule in rules.strip().split('\n'):
+        outer, inner = split_trim(rule, 'contain')
+        outer = re.sub(r'bags?', '', outer).strip()
+        d[outer] = {
+            color: amount
+            for amount, color in [
+                extract_inner(i)
+                for i in split_trim(inner, ',')
+                if 'no other bag' not in i  # Also matches "bags"
+            ]
+        }
+    return d
+
+
+def find_enclosing_bags(rules: TRules, color: str) -> Set[str]:
+    colors: Set[str] = set()
+    stack: Set[str] = set([color])
+
+    while len(stack):
+        for item in list(stack):
+            stack.remove(item)
+            for contains, enclosing in rules.items():
+                if item in enclosing:
+                    if contains not in colors:
+                        stack.add(contains)
+                        colors.add(contains)
+    return colors
+
+
+def count_containing(rules: TRules, color: str) -> int:
+    children = rules[color]
+    if not children:
+        return 0
+
+    return sum([
+        amount + amount * count_containing(rules, clr)
+        for clr, amount in children.items()
+    ])
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    rules = parse_rules(f.read())
+
+    color = 'shiny gold'
+    first = len(find_enclosing_bags(rules, color))
+    print(f'We can pack the {color} into {first} bags')
+
+    second = count_containing(rules, color)
+    print(f'We need to put {second} bags into {color}')
--- a/2020/solutions/7/test.txt
+++ b/2020/solutions/7/test.txt
@@ -0,0 +1,9 @@
+light red bags contain 1 bright white bag, 2 muted yellow bags.
+dark orange bags contain 3 bright white bags, 4 muted yellow bags.
+bright white bags contain 1 shiny gold bag.
+muted yellow bags contain 2 shiny gold bags, 9 faded blue bags.
+shiny gold bags contain 1 dark olive bag, 2 vibrant plum bags.
+dark olive bags contain 3 faded blue bags, 4 dotted black bags.
+vibrant plum bags contain 5 faded blue bags, 6 dotted black bags.
+faded blue bags contain no other bags.
+dotted black bags contain no other bags.
--- a/2020/solutions/8/README.md
+++ b/2020/solutions/8/README.md
@@ -0,0 +1,15 @@
+# 8
+
+Keep getting better! Today we write a little state machine, love it.
+
+So firstly we remember what `oc` (Operation Counter) we have already visited and if so we simply stop and return the accumulator.
+
+For I basically run the code many times, inverting `nop` to `jmp` and vice versa until i found a working instruction set.
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>1087</li>
+    <li>780</li>
+  </ol>
+</details>
--- a/2020/solutions/8/data.txt
+++ b/2020/solutions/8/data.txt
@@ -0,0 +1,613 @@
+nop +456
+nop +38
+acc +9
+jmp +153
+acc +15
+nop +560
+jmp +452
+acc +26
+acc +42
+jmp +376
+acc -5
+acc +12
+acc -5
+jmp +15
+jmp +1
+acc -9
+jmp +533
+acc +19
+acc +33
+acc +34
+jmp -6
+nop +404
+nop +140
+acc +0
+jmp +123
+acc +45
+acc +0
+jmp +496
+jmp +487
+acc +9
+acc +34
+jmp +484
+acc +0
+acc -14
+jmp +466
+acc +40
+acc +6
+acc +30
+jmp +444
+nop +386
+jmp +215
+acc +43
+acc +5
+nop -4
+jmp +535
+jmp -13
+acc +3
+acc +7
+acc +49
+acc -1
+jmp +245
+acc +9
+acc +31
+nop +142
+jmp +554
+acc +3
+jmp +493
+nop +399
+jmp +232
+acc -16
+acc +33
+jmp +410
+acc +33
+acc +5
+acc -17
+jmp +272
+acc -3
+acc +37
+jmp +181
+jmp -12
+nop +344
+acc +5
+acc -16
+jmp +290
+nop +530
+acc +15
+acc +3
+jmp +343
+acc +2
+acc +19
+jmp +298
+acc +43
+acc +25
+acc -19
+jmp +439
+acc +43
+acc +45
+acc +20
+jmp +355
+acc +13
+acc +24
+acc -15
+nop +396
+jmp +215
+acc -7
+acc +17
+jmp +441
+acc -8
+acc -19
+jmp +505
+jmp +282
+acc -17
+acc -8
+acc +20
+jmp +359
+acc +26
+acc +14
+acc +47
+acc +3
+jmp +298
+acc +31
+nop +205
+acc +0
+acc +7
+jmp +389
+acc -5
+acc +47
+jmp +94
+acc -13
+jmp +358
+acc -13
+jmp +134
+acc +8
+acc -19
+jmp +312
+acc +43
+acc +17
+jmp +97
+jmp +48
+nop +253
+acc +48
+acc -7
+acc -2
+jmp +23
+acc +26
+acc +14
+acc -14
+acc +17
+jmp +18
+acc +14
+acc +8
+jmp +341
+acc +35
+jmp +227
+acc +15
+acc -7
+jmp -95
+acc -19
+jmp -59
+jmp -31
+acc -6
+acc -4
+acc +24
+jmp +84
+acc -15
+jmp +82
+nop +74
+acc +8
+acc +9
+acc +13
+jmp +194
+jmp +376
+acc +34
+nop -16
+jmp -90
+acc +4
+acc +43
+nop +215
+jmp -147
+acc +0
+acc +11
+acc -15
+acc +23
+jmp +130
+acc +40
+jmp +106
+acc -4
+acc -18
+acc +18
+nop +329
+jmp +230
+acc +19
+nop +172
+acc +43
+jmp +304
+acc +44
+nop +213
+nop +195
+acc +6
+jmp -79
+acc +41
+acc -11
+acc +18
+acc -9
+jmp -25
+acc +27
+acc -6
+acc +31
+jmp -56
+acc +5
+acc +12
+acc +32
+acc +34
+jmp -189
+acc +32
+acc +5
+acc -16
+jmp +301
+nop +108
+nop -108
+jmp -141
+acc -12
+jmp +273
+acc +3
+jmp +140
+acc +7
+acc -11
+acc -17
+nop +194
+jmp -122
+acc -14
+nop +186
+acc +24
+jmp +277
+nop +341
+acc +18
+jmp -64
+acc +45
+acc +42
+jmp +52
+acc +39
+nop +91
+nop -8
+jmp +217
+acc +44
+acc +15
+jmp +72
+acc +24
+jmp -231
+acc -16
+nop +55
+nop +262
+acc +40
+jmp +234
+jmp -14
+acc +31
+nop -177
+acc +40
+jmp +343
+acc -8
+jmp -169
+acc +30
+acc +12
+acc -11
+jmp +41
+acc +9
+acc -9
+jmp +65
+acc +38
+acc +14
+jmp +335
+acc -19
+acc +38
+acc +16
+acc -11
+jmp +230
+jmp -71
+acc +48
+acc -13
+nop -255
+jmp +1
+jmp -220
+acc +2
+jmp +157
+jmp -105
+acc -16
+acc -5
+jmp -196
+acc +30
+jmp +139
+jmp +83
+acc -3
+acc -12
+jmp +254
+jmp -60
+acc +33
+jmp -37
+acc +17
+acc -14
+jmp +93
+nop +178
+acc +38
+acc +47
+jmp -89
+jmp +271
+acc +43
+acc +32
+jmp -240
+acc +26
+acc +32
+acc +30
+nop +284
+jmp +169
+acc -7
+acc +37
+jmp +102
+acc +4
+jmp +86
+jmp -123
+acc +0
+acc -14
+acc +18
+jmp +1
+jmp -5
+jmp -36
+jmp +148
+acc -17
+acc -14
+acc +28
+acc +15
+jmp +79
+jmp -289
+acc +42
+acc -5
+acc +13
+jmp +240
+acc -10
+acc -18
+acc -16
+jmp +103
+acc +21
+jmp +32
+nop +118
+acc +22
+acc -16
+acc +15
+jmp -186
+acc -2
+acc -14
+acc +22
+acc +16
+jmp +73
+acc -6
+jmp -225
+acc -18
+nop +113
+acc +50
+acc -6
+jmp +181
+acc +41
+jmp +1
+nop +92
+acc +23
+jmp +190
+acc +39
+acc +0
+acc +33
+jmp +111
+nop -63
+nop -81
+acc +9
+acc +35
+jmp +50
+acc +11
+jmp -295
+nop +230
+acc +34
+acc +12
+acc +47
+jmp +126
+acc +0
+nop -1
+acc +19
+acc -16
+jmp -360
+acc +29
+acc -2
+jmp -110
+acc +2
+acc +50
+jmp -36
+jmp -107
+jmp +178
+acc -11
+jmp +181
+nop +115
+nop +186
+jmp +95
+jmp +1
+nop +148
+acc +2
+acc +49
+jmp +173
+acc +38
+jmp +178
+acc +28
+acc +6
+acc +15
+jmp +110
+acc +49
+nop +100
+jmp +57
+acc +45
+nop +65
+acc +43
+acc +12
+jmp -272
+jmp -260
+nop +100
+jmp -224
+jmp +142
+jmp +52
+jmp -34
+jmp -110
+acc +35
+nop -112
+jmp +16
+jmp -18
+jmp -157
+jmp +81
+acc +1
+jmp -107
+acc +16
+acc +23
+jmp -255
+acc +22
+jmp +42
+nop +168
+acc +41
+jmp -311
+jmp -163
+jmp +118
+nop +4
+acc +18
+jmp +54
+jmp -414
+nop -181
+acc +10
+acc +23
+jmp -321
+nop -322
+acc -9
+jmp +101
+nop -7
+acc +35
+acc +46
+jmp -312
+nop +64
+nop -386
+jmp -280
+acc +16
+jmp -156
+acc +13
+nop -131
+jmp +1
+jmp -416
+jmp +15
+jmp -94
+jmp -330
+nop +93
+nop -205
+acc +48
+jmp -19
+jmp -70
+nop +21
+acc -5
+acc +19
+jmp +62
+acc +22
+jmp -448
+jmp -77
+acc +26
+acc -2
+jmp +70
+acc -2
+acc +21
+jmp -195
+nop -114
+jmp +107
+acc +37
+acc +6
+jmp -436
+acc +48
+jmp +96
+jmp -121
+acc +0
+jmp -74
+jmp +1
+acc +27
+acc +2
+jmp -279
+acc +7
+acc +0
+jmp +1
+jmp -413
+acc +6
+jmp -180
+acc +18
+acc +10
+jmp -437
+jmp -338
+nop -456
+jmp -463
+acc +1
+nop -54
+jmp -168
+acc +27
+jmp -479
+acc +42
+jmp -408
+jmp +85
+acc -16
+acc +24
+jmp -391
+jmp -206
+nop +8
+jmp +1
+acc +38
+nop -473
+jmp -94
+acc +10
+acc -14
+jmp -425
+acc +17
+nop -208
+acc +39
+jmp -265
+acc +3
+jmp -284
+acc +19
+acc +5
+nop -111
+acc +22
+jmp -309
+acc +12
+acc +39
+jmp -151
+acc +33
+acc -14
+jmp -450
+acc +16
+nop +50
+jmp -188
+acc -13
+acc +15
+acc +4
+jmp -484
+acc +27
+jmp -98
+acc +34
+jmp -120
+jmp -537
+acc +43
+acc -8
+acc -6
+jmp -405
+acc -8
+nop -179
+acc -11
+jmp -264
+acc +24
+jmp -280
+acc -6
+acc +1
+jmp -353
+acc -18
+jmp -58
+acc +1
+acc -7
+acc -2
+acc +44
+jmp -115
+nop -328
+acc +27
+acc +2
+jmp +20
+acc +14
+acc +34
+jmp -460
+nop -445
+acc -9
+acc +24
+acc -11
+jmp -72
+jmp -434
+jmp -370
+acc +35
+acc +43
+acc +45
+acc +44
+jmp -287
+jmp -546
+nop -474
+acc -6
+jmp -357
+nop -163
+nop -218
+nop -342
+jmp -570
+acc +44
+acc +4
+acc +35
+acc +6
+jmp -541
+jmp -274
+acc +48
+acc -18
+jmp -171
+acc -13
+acc -14
+acc +25
+acc +26
+jmp +1
--- a/2020/solutions/8/python/main.py
+++ b/2020/solutions/8/python/main.py
@@ -0,0 +1,63 @@
+from os.path import join, dirname
+from typing import List, Optional, Set, Tuple
+
+Instructions = List[Tuple[str, int]]
+
+
+class VM:
+    def __init__(self, code: str) -> None:
+        instructionsRaw = code.strip().split('\n')
+        self.acc = 0
+        self.oc = 0
+        self.invert: Optional[int] = None
+        self.instructions: Instructions = []
+        for instruction in instructionsRaw:
+            op, value = instruction.split(' ')
+            self.instructions.append((op, int(value)))
+
+    def reset(self):
+        self.acc = 0
+        self.oc = 0
+
+    def exec(self):
+        op, value = self.instructions[self.oc]
+        if self.oc == self.invert:
+            op = 'jmp' if op == 'nop' else 'nop'
+        if op == 'nop':
+            self.oc += 1
+        elif op == 'acc':
+            self.acc += value
+            self.oc += 1
+        elif op == 'jmp':
+            self.oc += value
+
+    def run(self) -> Tuple[int, bool]:
+        self.reset()
+        already_visited: Set[int] = set()
+        m = len(self.instructions)
+        while True:
+            if self.oc in already_visited:
+                return (self.acc, True)
+            if not self.oc < m:
+                return (self.acc, False)
+            already_visited.add(self.oc)
+            self.exec()
+
+    def fix(self):
+        for i, instruction in enumerate(self.instructions):
+            op, _ = instruction
+            if op == 'nop' or op == 'jmp':
+                self.invert = i
+                acc, error = self.run()
+                if not error:
+                    return acc
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    vm = VM(f.read())
+
+    acc, err = vm.run()
+    print(acc)
+
+    print(vm.fix())
--- a/2020/solutions/8/test.txt
+++ b/2020/solutions/8/test.txt
@@ -0,0 +1,9 @@
+nop +0
+acc +1
+jmp +4
+acc +3
+jmp -3
+acc -99
+acc +1
+jmp -4
+acc +6
--- a/2020/solutions/9/README.md
+++ b/2020/solutions/9/README.md
@@ -0,0 +1,11 @@
+# 9
+
+Again the python std lib saved me some lines of code. `itertools` to the rescue and basically we are done.
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>23278925</li>
+    <li>4011064</li>
+  </ol>
+</details>
--- a/2020/solutions/9/data.txt
+++ b/2020/solutions/9/data.txt
--- a/2020/solutions/9/python/main.py
+++ b/2020/solutions/9/python/main.py
@@ -0,0 +1,50 @@
+from os.path import join, dirname
+from typing import List, Optional, Set, Tuple
+from itertools import combinations
+
+
+class XMAS:
+
+    def __init__(self, data: str, size: int) -> None:
+        self.size: int = size
+        self.position: int = size
+        self.buffer: List[int] = [
+            int(x)
+            for x in data.strip().split('\n')
+        ]
+
+    def check_next(self) -> bool:
+        possible = [
+            a + b
+            for a, b in combinations(self.buffer[self.position - self.size: self.position], 2)
+        ]
+        return self.buffer[self.position] in possible
+
+    def find_first_invalid(self) -> int:
+        l = len(self.buffer)
+        while self.position < l:
+            valid = self.check_next()
+            if not valid:
+                return self.buffer[self.position]
+            self.position += 1
+        raise Exception
+
+    def find_slice(self, target: int):
+        l = len(self.buffer)
+        for n in range(l):
+            for m in range(n, l):
+                slice = self.buffer[n: m]
+                if sum(slice) == target:
+                    return min(slice) + max(slice)
+        raise Exception
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    xmas = XMAS(f.read(), 25)
+
+    first_invalid = xmas.find_first_invalid()
+    print(first_invalid)
+
+    solution = xmas.find_slice(first_invalid)
+    print(solution)
--- a/2020/solutions/9/test.txt
+++ b/2020/solutions/9/test.txt
@@ -0,0 +1,20 @@
+35
+20
+15
+25
+47
+40
+62
+55
+65
+95
+102
+117
+150
+182
+127
+219
+299
+277
+309
+576