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day 3

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Tim Stallard 2020-12-03 14:19:28 +00:00
parent d68b80b8a2
commit c5d1577688
4 changed files with 349 additions and 0 deletions
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03/1.py Normal file
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lines = open("input", "r").read().split("\n")
lines = [l for l in lines if l]
visited = [l[(i*3)%len(l)] for i, l in enumerate(lines)]
trees = [t for t in visited if t == "#"]
print(len(trees))

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03/2.py Normal file
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lines = open("input", "r").read().split("\n")
lines = [l for l in lines if l]
def treecount(r, d):
rows = [l for i, l in enumerate(lines) if i%d==0]
visited = [l[(i*r)%len(l)] for i, l in enumerate(rows)]
trees = [t for t in visited if t == "#"]
return len(trees)
print(treecount(1,1), treecount(3,1), treecount(5,1), treecount(7,1), treecount(1,2))
print(treecount(1,1) * treecount(3,1) * treecount(5,1) * treecount(7,1) * treecount(1,2))

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