#include <iostream>
#include <list>
#include <vector>
#include <string>
#include <stdio.h>
#include <stdint.h>
using namespace std;

using uint = unsigned int;
using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define GETLINE( A ) string A; getline( cin , A ) 

int main()
{

  CIN( ll , N );
  ll c;
  list<ll> C{};
  ll sum = 0;
  
  for( ll i = 0 ; i < N ; i++ ){

    cin >> c;
    C.push_back( c );
    sum += c;
    
  }

  ll answer = 0;

  for( auto itr = C.begin() , end = C.end() ; itr != end ; itr++ ){

    const ll& C_i = *itr;
    
    if( C_i * 10 <= sum ){

      answer += 30;

    }

  }

  cout << answer << endl;
  return 0;

}