26 lines
506 B
Plaintext
26 lines
506 B
Plaintext
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#!/usr/bin/python3
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slope = []
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with open("input") as fh:
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for ln in fh:
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row = []
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for c in ln:
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if c == "#":
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row.append(True)
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elif c == ".":
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row.append(False)
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elif c == "\n":
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pass
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else:
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raise RuntimeError("impossible")
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slope.append(row)
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xmod = len(slope[0])
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x = 0
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y = 0
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trees = 0
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while y < len(slope):
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trees += slope[y][x % xmod]
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x += 3
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y += 1
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print(trees)
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