39 lines
665 B
Crystal
39 lines
665 B
Crystal
require "advent"
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struct Range(B, E)
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def contains?(other)
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other.begin >= self.begin && other.end <= self.end
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end
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def overlaps?(other)
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these = self.to_a
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others = other.to_a
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these.any? { |i| others.includes? i }
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end
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end
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INPUT = input(2022, 4).lines.map do |line|
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first, second = line.split(",").map do |str|
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left, right = str.split("-").map &.to_i64
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left..right
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end
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{first, second}
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end
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def part1(input)
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input.count do |pair|
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l, r = pair
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l.contains?(r) || r.contains?(l)
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end
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end
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def part2(input)
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input.count do |pair|
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l, r = pair
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l.overlaps?(r)
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end
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end
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puts part1(INPUT.clone)
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puts part2(INPUT.clone)
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