const fs = require("fs");

const inputFileName = "input";

async function main() {
  const input = await fs.promises.readFile(inputFileName, "utf-8");

  const machine = input.split(",").map((code) => parseInt(code));
  machine[1] = 12;
  machine[2] = 2;

  for (let noun = 0; noun < 100; noun++) {
    for (let verb = 0; verb < 100; verb++) {
      machine[1] = noun;
      machine[2] = verb;
      if (intMachine(machine.slice()) == 19690720) {
        console.log(100 * noun + verb);
        process.exit();
      }
    }
  }
}

function intMachine(machine) {
  let curIdx = 0;
  let opCode = machine[curIdx];
  while (opCode !== 99) {
    const val1 = machine[machine[curIdx + 1]];
    const val2 = machine[machine[curIdx + 2]];
    const register = machine[curIdx + 3];
    if (opCode === 1) {
      machine[register] = val1 + val2;
    } else if (opCode === 2) {
      machine[register] = val1 * val2;
    } else {
      throw Error("invalid opcode");
    }

    curIdx += 4;
    opCode = machine[curIdx];
  }
  return machine[0];
}

main();