#include<bits/stdc++.h>
#define rep(i,a,n) for (int i = a;i < n;i++)
#define per(i,n,a) for (int i = n-1;i >= a;i--)
using namespace std;

int main() {
    int n,sum = 0,ans = 0; cin >> n;
    int c[n];
    rep(i,0,n){
        cin >> c[i];
        sum += c[i];
    }

    rep(i,0,n){
        if(sum / 10 >= c[i])
            ans += 30;
    }

    cout << ans << "\n";
}