#include <iostream>
using namespace std;
int main(void){
    
    int n;
    cin >> n;
    int c[n];
    int sum = 0;
    for(int i = 0; i < n; i++) {
        cin >> c[i];
        sum += c[i];
    }
    
    int ans = 0;
    for(int i = 0 ; i < n; i++) {
        if(c[i] <= sum / 10 )ans += 30;
    }
    cout << ans;
    
    
}