#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <cstring>

typedef long long ll;
using namespace std;

#define mod 1000000007
#define INF 1000000000 //(int)1e9
#define LLINF 2000000000000000000 //(ll)2e18
#define PI  3.1415926536

#define SIZE 1000


int main(){
    int n;
    int c[SIZE];
    int sum=0;
    int ans=0;
    
    cin >> n;
    
    for(int i=0;i<n;i++){
        scanf("%d",&c[i]);
        sum+=c[i];
        c[i]*=10;
    }
    
    for(int i=0;i<n;i++){
        if(sum>=c[i]) ans+=30;
    }
    
    cout << ans << endl;
    
    
    
    return 0;
}