#include <iostream>
#include <iomanip>

#include <algorithm>
#include <math.h>

#include <string>
#include <list>
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////

int main(void){
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << fixed;//
    //cout << setprecision(6);//

	int N;
	cin>>N;//[1,100]
	int c[100];//[0,10^6]
	int sum=0;
	rep(i,N){
		cin>>c[i];
		sum += c[i];
	}

	int per10 = sum/10;
	int ans = 0;
	rep(i,N){
		if(c[i] <= per10){
			ans += 30;
		}
	}

	P(ans);

    return 0;
}