Java

lizncu

class ParkingSystem {
  int site[];

  public ParkingSystem(int big, int medium, int small) {
    site = new int[] {big, medium, small};
  }

  public boolean addCar(int carType) {
    if (site[carType - 1] > 0) {
      site[carType - 1]--;
      return true;
    }
    return false;
  }
}