#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001

int main(){	
	
	int n;
	cin>>n;
	int s = 0;
	vector<int> c(n);
	rep(i,n){
		cin>>c[i];
		s += c[i];
	}
	int ans = 0;
	rep(i,n){
		if(c[i]*10<=s)ans+=30;
	}
	cout<<ans<<endl;
	
	return 0;
	
}