25 lines
661 B
Ruby
25 lines
661 B
Ruby
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#!/usr/bin/env ruby
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require_relative '../common'
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class Day04 < Day
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def part1
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stdin.map do |pair|
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pair.split(',').map { |elve| first, last = elve.split('-'); first.to_i..last.to_i }
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end.select do |pair|
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pair.first.cover?(pair.last) || pair.last.cover?(pair.first)
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end.size
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end
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def part2
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stdin.map do |pair|
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pair.split(',').map { |elve| first, last = elve.split('-'); first.to_i..last.to_i }
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end.select do |pair|
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pair.first.include?(pair.last.first) || pair.first.include?(pair.last.last) ||
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pair.last.include?(pair.first.first) || pair.last.include?(pair.first.last)
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end.size
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end
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end
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Day04.run
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