Swiftgram/submodules/ton/tonlib-src/crypto/func/test/a7.fc

int steps(int x) {
  var n = 0;
  while (x > 1) {
    n += 1;
    if (x & 1) {
      x = 3 * x + 1;
    } else {
      x >>= 1;
    }
  }
  return n;
}