text: //gj2007.c
  int main() {
      int x = 0;
      int y = 50;
      while (x < 100) {
          if (x < 50) {
              x = x + 1;
          } else {
              x = x + 1;
              y = y + 1;
          }
      }
      assert(y == 100);
      return 0;
  }
  