#include <iostream>
#include <vector>
#include <numeric>
using namespace std;

int main() {
  int n, ans = 0;
  cin >> n;
  vector<int> a(n);
  for (auto& e : a) cin >> e;
  int b = accumulate(a.begin(), a.end(), 0) / 10;
  for (auto& e : a) {
    if (e <= b) ans += 30;
  }
  cout << ans << endl;
}