33 lines
557 B
Ruby
33 lines
557 B
Ruby
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#!/bin/env ruby
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commands = File.readlines('./input').map(&:split).map{ [_1.to_sym,_2.to_i] }
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# Part 1
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dist, depth = 0,0
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commands.each do |command, unit|
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case command
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when :forward
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dist += unit
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when :down
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depth += unit
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when :up
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depth -= unit
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end
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end
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p dist * depth
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# Part 2
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dist, depth, aim = 0,0,0
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commands.each do |command, unit|
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case command
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when :forward
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depth += aim * unit
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dist += unit
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when :down
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aim += unit
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when :up
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aim -= unit
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end
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end
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p dist * depth
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