#include <iostream>
#include <vector>
#include <numeric>
using namespace std;

int main(){
    int n;
    cin >> n;
    vector<int> c(n);
    for (int i = 0; i < n; i++)
        cin >> c[i];
    int total = accumulate(c.begin(),c.end(),0);
    int ans = 0;
    for (auto x : c){
        if (x * 10 <= total)
            ans += 30;
    }
    cout << ans << endl;
    return 0;
}