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

int main() {
  int N;
  cin >> N;
  int c[111];
  int sum = 0;
  for (int i = 0; i < N; i++) {
    cin >> c[i];
    sum += c[i];
  }
  int ans = 0;
  for (int i = 0; i < N; i++) {
    if (c[i] * 10 <= sum) ans += 30;
  }
  cout << ans << endl;
  return 0;
}