40 lines
937 B
Ruby
40 lines
937 B
Ruby
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#!/bin/env ruby
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def run_code (instructions)
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acc = 0
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tracker = Array.new(instructions.length, false)
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i = 0
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success = false
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while tracker[i] == false do
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tracker[i] = true
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case instructions[i][0..2]
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when 'acc'
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acc += instructions[i].split(' ')[1].to_i
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i += 1
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when 'jmp'
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i += instructions[i].split(' ')[1].to_i
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when 'nop'
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i += 1
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end
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success = true if i == instructions.length
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end
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return success, acc, tracker
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end
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input = File.readlines('./input').to_ary.map(&:strip)
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succ, acc, tracker = false, 0, []
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input.each.with_index do |instruction, i|
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mod = input.map(&:clone)
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if instruction[0..2] == 'jmp'
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mod[i][0..2] = 'nop'
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elsif instruction[0..2] == 'nop'
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mod[i][0..2] = 'jmp'
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else
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next
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end
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succ, acc, tracker = run_code(mod)
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break if succ == true
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end
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p acc
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