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

int a[334], N, p, b;

int main()
{
    int ans = 0;
    cin >> N;
    for (int i = 0; i < N; i++)
    {
        cin >> a[i];
        p += a[i];
    }
    for (int i = 0; i < N; i++)
    {
        if (a[i] <= p / 10)
            ans += 30;
    }
    cout << ans << endl;
}