#include <bits/stdc++.h>
#define fastIO (cin.tie(0), cout.tie(0), ios::sync_with_stdio(false))
using namespace std;

int main() {
  fastIO;
  int n;
  cin >> n;

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

  int ans = 0;
  for (const auto c : C) {
    if (c <= sum / 10) {
      ans += 30;
    }
  }

  cout << ans << '\n';
  return 0;
}