41 lines
895 B
Python
41 lines
895 B
Python
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from grid import Grid
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def main():
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with open("day3.txt", "rt") as f:
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lines = [line.rstrip() for line in f.readlines()]
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g = Grid(lambda: ".")
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g.load(lines)
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g_width = len(lines[0])
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g_height = len(lines)
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# Part 1
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x, y = 0, 0
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num_trees = 0
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while y < g_height:
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x += 3
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x %= g_width
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y += 1
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if g.getv(x, y) == "#":
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num_trees += 1
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print("Trees encountered:", num_trees)
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# Part 2
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v = 1
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for xx, yy in [(1, 1), (3, 1), (5, 1), (7, 1), (1, 2)]:
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x, y = 0, 0
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num_trees = 0
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while y < g_height:
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x += xx
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x %= g_width
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y += yy
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if g.getv(x, y) == "#":
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num_trees += 1
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print(f"Slope ({xx}, {yy}), trees encountered:", num_trees)
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v *= num_trees
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print("Value:", v)
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if __name__ == "__main__":
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main()
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