#include <bits/stdc++.h>
using namespace std;

int main() {
    int n, l[100], sum = 0, line = 0, ans = 0;
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> l[i];
        sum += l[i];
    }
    line = sum / 10;
    for (int i = 0; i < n; i++) {
        if (line >= l[i]) ans += 30;
    }
    cout << ans << endl;
}