import java.util.Scanner;

  public class Main {
      public static void main(String[] args) {
          Scanner sc = new Scanner(System.in);
 
          int n = sc.nextInt();
          int[] getVotes = new int[n];
          int sum = 0;
          int depositMoney = 0;
          
          
          for(int i=0; i<n; i++){
              getVotes[i] = sc.nextInt();
              sum += getVotes[i];
          }
          
          int standard = sum / 10;

          for(int j=0; j<n; j++){
              if(getVotes[j]<=standard){
                  depositMoney += 30;
              }
          }
          
          System.out.println(depositMoney);
          
      }
  }