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51 lines
1.2 KiB
Python
51 lines
1.2 KiB
Python
from typing import Dict, List
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from os.path import join, dirname
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from functools import reduce
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class Forest():
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def __init__(self, text: str) -> None:
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self.text = text.strip().split('\n')
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@property
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def height(self) -> int:
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return len(self.text)
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def is_tree_at(self, y: int, x: int) -> bool:
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if y > self.height:
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return False
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row = self.text[y]
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return row[x % len(row)] == '#'
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data = join(dirname(__file__), 'data.txt')
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with open(data) as f:
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forest = Forest(f.read())
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# 1
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trees: int = 0
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for y in range(forest.height):
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is_tree: bool = forest.is_tree_at(y, y*3)
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if is_tree:
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trees += 1
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print(f'Result Simple: {trees}')
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# 2
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all: Dict[str, int] = {
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'11': 0,
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'13': 0,
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'15': 0,
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'17': 0,
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'21': 0,
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}
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for i in range(forest.height):
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for key, value in all.items():
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dy, dx = map(int, list(key))
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y = i * dy
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x = i * dx
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if forest.is_tree_at(y, x):
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all[key] += 1
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total = reduce((lambda x, y: x * y), all.values())
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print(f'Result Combined: {list(all.values())} = {total}')
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