#include <algorithm>
#include <vector>
#include <cfloat>
#include <string>
#include <cmath>
#include <set>
#include <cstdlib>
#include <map>
#include <ctime>
#include <iomanip>
#include <functional>
#include <deque>
#include <iostream>
#include <cstring>
#include <queue>
#include <cstdio>
#include <stack>
#include <climits>
#include <sys/time.h>
#include <cctype>

using namespace std;

typedef long long ll;

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