#!/usr/bin/env ruby

class Machine
  def initialize(starting_memory = [])
    @mem = starting_memory
    @pc = 0
    @halt = false
  end

  def mem(start = 0, len = @mem.length)
    @mem[start...(start + len)]
  end

  def halt!
    @halt = true
  end

  def halt?
    @halt
  end

  def step
    return if halt?
    case @mem[@pc]
    when 1
      @mem[@mem[@pc+3]] = @mem[@mem[@pc+1]] + @mem[@mem[@pc+2]]
      @pc += 4
    when 2
      @mem[@mem[@pc+3]] = @mem[@mem[@pc+1]] * @mem[@mem[@pc+2]]
      @pc += 4
    when 99
      halt!
      @pc += 1
    end
  end

  def run
    until halt? do
      step
    end
  end
end

input = $stdin.readlines[0].strip.split(",").map(&:to_i)

input[1] = 12
input[2] = 2

m = Machine.new(input)
m.run

puts m.mem(0, 1)