#include <iostream>
#include <vector>

using namespace std;

int main(){
    int N;
    cin >> N;
    vector<int> num(N);
    int total = 0;
    for(int i = 0; i < N; i++){
        cin >> num[i];
        total += num[i];
    }
    int money = 0;
    for(int i = 0; i < N; i++){
        if(total >= num[i] * 10) money += 30;
    }
    cout << money << endl;
    return 0;
}