#include <bits/stdc++.h>
using namespace std;
typedef int64_t lint;

int main()
{
    lint n;
    cin>>n;
    vector<lint> v;
    lint cnt=0;
    lint sum=0;
    for(lint i=0;i!=n;i++){
        lint c;
        cin>>c;
        cnt+=c;
        v.push_back(c);
    }
    for(lint i=0;i!=n;i++){
        if(v[i]<=cnt/10){
            sum+=30;
        }
    }
    cout<<sum<<endl;
    

    // system("pause");
}