38 lines
793 B
Crystal
38 lines
793 B
Crystal
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INPUT = File.read("day2.txt").lines.map(&.chomp)
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def part1
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input = INPUT.clone
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total = 0
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input.each do |line|
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data = line.match(/([0-9]+)-([0-9]+) ([a-z]): ([a-z]+)/)
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next unless data
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min = data[1].to_i
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max = data[2].to_i
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char = data[3][0]
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str = data[4]
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count = str.chars.count(char)
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total += 1 if count >= min && count <= max
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end
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puts total
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end
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def part2
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input = INPUT.clone
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total = 0
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input.each do |line|
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data = line.match(/([0-9]+)-([0-9]+) ([a-z]): ([a-z]+)/)
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next unless data
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min = data[1].to_i - 1
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max = data[2].to_i - 1
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char = data[3][0]
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str = data[4]
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count = str.chars.count(char)
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total += 1 if ((str[min] == char) || (str[max] == char) ) && str[min] != str[max]
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end
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puts total
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end
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part1
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part2
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