#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <math.h>
#include <cmath>
#include <limits.h>
#include <map>
#include <set>
#include <queue>
#include <algorithm>
#include <functional>
#include <stdio.h>
using namespace std;

long long MOD = 1000000007;

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