#include <algorithm>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <string>
#include <vector>
#include <cmath>
using namespace std;

int C[100];

int main() {
    int n;
    cin >> n;

    int sum = 0;

    for (int i = 0; i < n; i++) {
        cin >> C[i];
        sum += C[i];
    }

    sum /= 10;

    int ans = 0;
    for (int i = 0; i < n; i++) {
        if (C[i] <= sum) ans += 30;
    }

    cout << ans << endl;
}