#include <bits/stdc++.h>
using namespace std;

int main() {
  int n, sum = 0, ans = 0;
  cin >> n;
  int c[n];
  for (int i = 0; i < n; i++) {
    cin >> c[i];
    sum += c[i];
  }
  int a = sum / 10;
  for (int i = 0; i < n; i++) {
    if (c[i] <= a) ans += 30;
  }
  cout << ans << endl;
  return 0;
}