30 lines
481 B
Crystal
30 lines
481 B
Crystal
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INPUT = File.read("day3.txt").lines.map(&.chomp)
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def run(input, slopes)
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prod = 1_i64
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slopes.each do |slope|
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trees = 0
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pos = 0
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line = 0
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right, down = slope
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while line < input.size
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trees += 1 if input[line][pos] == '#'
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pos = (pos + right) % input[line].size
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line += down
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end
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prod *= trees
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end
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prod
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end
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def part1
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puts run(INPUT, [{3,1}])
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end
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def part2
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puts run(INPUT, [{1,1}, {3,1}, {5,1}, {7,1}, {1,2}])
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end
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part1
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part2
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