#include <iostream>
#include <vector>

using namespace std;
int main(void){
int n;
vector<int> vec;
int count = 0;

cin >> n;

for(int i = 0; i < n; i++)
{
    int temp;
    cin >> temp;
    vec.emplace_back(temp);
}

int sum = 0;

for(int i = 0; i < n; i++)
{
    sum += vec[i];
}

for(int i = 0; i < n; i++)
{
    if(vec[i] <= sum/10.0)
    {
        count += 30;
    }
}

cout << count << endl;
    
}