#include <bits/stdc++.h>
#define int long long 
using namespace std;
using Graph = vector<vector<int>>;

signed main(){
  int N;
  cin >> N;
  vector<int> A(N);
  int T = 0;
  for( int i = 0; i < N; i++ ){
    cin >> A.at(i);
    T += A.at(i);
  }
  T /= 10;
  int ans = 0;
  for( int i = 0; i < N; i++ ){
    if( A.at(i) <= T ) ans += 30;
  }
  cout << ans << endl;
}