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๐ŸŒฒ - 2024 DAY 1 SOLUTIONS -๐ŸŒฒ (programming.dev)
submitted 2 years ago by [M] to c/advent_of_code@programming.dev
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Day 1: Historian Hysteria

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FAQ

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[โ€“] 1 point 2 years ago*

Crystal

f = ARGV[0]? ? File.read_lines("input.txt") : test.lines
list1 = Array(Int32).new(f.size)
list2 = Array(Int32).new(f.size)

f.each do |l|
	nums = l.split.map(&.to_i)
	list1.push(nums[0])
	list2.push(nums[1])
end

list1.sort!
list2.sort!

puts list1.zip(list2).sum{ |l1, l2| (l1 - l2).abs }

puts list1.sum {|x| x * list2.count x}
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