37 lines
1020 B
Python
37 lines
1020 B
Python
def check_slope_for_trees(plan, x_right=3, y_down=1):
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x_max = len(plan[0])
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y_max = len(plan)
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x, y = 0, 0
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tree_count = 0
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while y < y_max - 1:
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x += x_right
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x %= x_max # wrap x
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y += y_down
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pos = plan[y][x]
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if pos == '#':
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tree_count += 1
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return tree_count
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def part1(inp):
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plan = [line.rstrip() for line in open(inp)]
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tree_count = check_slope_for_trees(plan)
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print(f"number of trees : {tree_count}")
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def part2(inp):
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plan = [line.rstrip() for line in open(inp)]
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slopes = [{"x": 1, "y": 1}, {"x": 3, "y": 1}, {"x": 5, "y": 1}, {"x": 7, "y": 1}, {"x": 1, "y": 2}]
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tree_product = 1
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for slope in slopes:
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tree_count = check_slope_for_trees(plan, slope["x"], slope["y"])
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tree_product *= tree_count
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print(f"slope {slope} number of trees : {tree_count}")
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print(f"Cumulative product of tress : {tree_product}")
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if __name__ == "__main__":
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#part1('./input.txt')
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part2('input.txt')
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