public class Kata {
    
    public static int speedLimit(int speed, int[] signals) {
      int penalty = 0;
      
      for (int i = 0; i < signals.length; i++){
        if (speed > signals[i]){
          if (speed - signals[i] >= 30){
            penalty += 500;
          } else if (speed - signals[i] >= 20 && speed - signals[i] < 30){
            penalty += 250;
          } else if (speed - signals[i] >= 10 && speed - signals[i] < 20){
            penalty += 100;
          }
        }
      }
      return penalty;
    }
}