#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <iomanip>
using namespace std;
using ll = long long;

int main() {
    int N;
    cin >> N;
    vector<int> C(N);
    int sum = 0;
    for(int i=0; i<N; ++i) {
        cin >> C[i];
        sum += C[i];
    }
    int res = 0;
    for(int i=0; i<N; ++i) {
        if(C[i]*10 <= sum) {
            res += 30;
        }
    }
    cout << res << endl;
}