#include <bits/stdc++.h>
using namespace std;
int main(){
    int N; cin >> N;
    std::vector<int> cn;
    int c,sum=0;
    for(int i=0; i<N; i++){
        cin >> c;
        cn.push_back(c);
        sum += c;
    } 
    sum /= 10;
    int rel;
    for(int i=0; i < N; i++){
        if(cn[i] <= sum) rel += 30;
    }
    cout << rel << endl;
}