#include <algorithm>
#include <cstdio>
#include <iostream>
#include <string>
#include <vector>
#include <map>
#define rep(i, n) for (int i=0; i<n; ++i)
#define FOR(i, a, b) for (int i=a; i<b+1; ++i)
#define pb(x) push_back(x)
#define ll long long
using namespace std;

const int inf =1500000000;
int main () {
  int n;
  cin >> n;
  int c[n], cnt = 0, sum  = 0;
  rep(i, n) cin >> c[n];
  rep(i, n) cnt += c[i];
  rep(i, n) if (cnt >= c[i] * 10) {sum += 30;}
  cout  << sum << endl;
 
  return 0;
}