04

2022/04/README.md

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+# 04
+
+A good usage for the `__contains__` python method, love the dunder :)
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>431</li>
+    <li>823</li>
+  </ol>
+</details>

2022/04/python/main.py

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+#!/usr/bin/env python
+
+from dataclasses import dataclass
+from os.path import dirname, join
+
+# Day 04
+
+# Common
+
+
+def read_input(filename):
+    data = join(dirname(__file__), '..', filename)
+    with open(data) as f:
+        return f.read().strip()
+
+
+test = read_input('test.txt')
+data = read_input('input.txt')
+
+
+@dataclass
+class CleaningJob:
+    start: int
+    end: int
+
+    def __len__(self):
+        return self.end - self.start
+
+    def __contains__(self, other) -> bool:
+        if isinstance(other, CleaningJob):
+            return self.start <= other.start and self.end >= other.end
+        elif type(other) is int:
+            return self.start <= other <= self.end
+        else:
+            return False
+
+    def overlaps(self, other: 'CleaningJob') -> bool:
+        return other.start in self or other.end in self or other in self
+
+
+@dataclass
+class CleaningPair:
+    one: CleaningJob
+    two: CleaningJob
+
+    @staticmethod
+    def parse(data: str):
+        jobs = [
+            CleaningJob(*map(int, job.split('-')))
+            for job in data.split(',')
+        ]
+        return CleaningPair(*jobs)
+
+    def is_duplicated(self):
+        return self.one in self.two or self.two in self.one
+
+    def overlaps(self):
+        return self.one.overlaps(self.two) or self.two.overlaps(self.one)
+
+
+@dataclass
+class CleaningSquad:
+    pairs: list[CleaningPair]
+
+    @staticmethod
+    def parse(data: str):
+        return CleaningSquad([
+            CleaningPair.parse(line)
+            for line in data.split('\n')
+        ])
+
+    def check_duplicate(self):
+        return sum([pair.is_duplicated() for pair in self.pairs])
+
+    def check_overlap(self):
+        return sum([pair.overlaps() for pair in self.pairs])
+
+        # 1
+print('1.')
+squad = CleaningSquad.parse(test)
+print(squad.check_duplicate())
+squad = CleaningSquad.parse(data)
+print(squad.check_duplicate())
+
+# 2
+print('\n2.')
+squad = CleaningSquad.parse(test)
+print(squad.check_overlap())
+squad = CleaningSquad.parse(data)
+print(squad.check_overlap())