#!/usr/bin/env ruby

def process_opcodes(list)
  index = 0

  while index < (list.length - 1)
    opcode = list[index]
    case opcode
    when 1
      input1 = list[list[index+1]]
      input2 = list[list[index+2]]
      list[list[index+3]] = input1 + input2
    when 2
      input1 = list[list[index+1]]
      input2 = list[list[index+2]]
      list[list[index+3]] = input1 * input2
    when 99
      break
    end
    index += 4
  end
  return list
end

ARGF.each do |line|
  # Eat the opcode list
  list = line.split(",").map(&:to_i)

  # Fix the program as per the exercise
  list[1] = 12
  list[2] = 2

  # Print the post processed list for inspection to get the 0th element
  puts process_opcodes(list).inspect
end