#include<iostream>
#include<sstream>
#include<algorithm>
#include<map>
#include<set>
#include<queue>
#include<complex>
#include<cstdio>
#include<cstdlib>
#include<cstring>
// #define DEBUG

using namespace std;

// typedef pair<int,int>P;
// typedef complex<double>P;

typedef long long int ll;
typedef unsigned long long int ull;

const int INF = 1e9;
const double EPS=1e-9;

int main(int argc, char *argv[])
{
  int n;
  cin >> n;
  int a[n];
  int sum = 0;
  for(int i = 0 ; i < n ; i++){
    cin >> a[i];
    sum += a[i];
  }
  int res = 0;
  for(int i = 0 ; i < n ; i++){
    if(a[i] <= sum/10)res += 30;
  }
  cout << res << endl;
  return 0;
}