#include <bits/stdc++.h>

using namespace std;

int main() {
  int n;
  cin >> n;
  int sum = 0;
  vector<int> c(n);
  for (int i = 0; i < n; ++i) {
    cin >> c[i];
    sum += c[i];
  }

  int low = sum / 10;
  int ans = 0;
  for (int i = 0; i < n; ++i) {
    if (c[i] <= low) ans += 30;
  }
  cout << ans << '\n';
  return 0;
}