fun gcd(num1: Int, num2: Int): Int {
  var a = num1
  var b = num2

  while (a != b) {
    if (a > b) {
      a -= b
    } else {
      b -= a
    }
  }

  return a
}

fun main() {
  val a = 32
  val b = 12

  val result = gcd(a, b)

  println("GCD($a, $b) = $result")
}