56 lines
1.9 KiB
Ruby
56 lines
1.9 KiB
Ruby
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#!/bin/env ruby
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require 'pry'
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input = File.readlines('./input').map(&:strip)
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lights = Array.new(1000) { Array.new(1000, false) }
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instructions = Hash.new
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instructions = input.map.with_index do |line, i|
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line.slice!('turn')
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line = line.split(' ')
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{ Command: line[0], Start: line[1].split(',').map!(&:to_i), End: line[3].split(',').map!(&:to_i) }
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end
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instructions.each do | instruction |
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x = instruction[:End][0] - instruction[:Start][0] + 1
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y = instruction[:End][1] - instruction[:Start][1] + 1
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y.times do |y|
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x.times do |x|
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case instruction[:Command]
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when 'on'
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lights[instruction[:Start][0] + x][ instruction[:Start][1] + y] = true
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when 'off'
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lights[instruction[:Start][0] + x][ instruction[:Start][1] + y] = false
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when 'toggle'
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lights[instruction[:Start][0] + x][ instruction[:Start][1] + y] = !(lights[instruction[:Start][0] + x][ instruction[:Start][1] + y])
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end
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end
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end
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end
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puts "Part 1 Solution: #{lights.flatten.count(true)}"
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# Part 2 (sloppy style)
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lights = Array.new(1000) { Array.new(1000, 0) }
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instructions.each do | instruction |
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x = instruction[:End][0] - instruction[:Start][0] + 1
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y = instruction[:End][1] - instruction[:Start][1] + 1
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y.times do |y|
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x.times do |x|
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case instruction[:Command]
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when 'on'
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lights[instruction[:Start][0] + x][ instruction[:Start][1] + y] += 1
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when 'off'
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lights[instruction[:Start][0] + x][ instruction[:Start][1] + y] -= 1
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lights[instruction[:Start][0] + x][ instruction[:Start][1] + y] = 0 if lights[instruction[:Start][0] + x][ instruction[:Start][1] + y] < 0
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when 'toggle'
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lights[instruction[:Start][0] + x][ instruction[:Start][1] + y] += 2
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end
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end
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end
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end
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puts "Part 2 Solution: #{lights.flatten.sum}"
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