#include "bits/stdc++.h"
using namespace std;

typedef long long Int;
#define REP(i,n) for(int (i)=0;(i)<(int)(n);++(i))

int N;
int C[100];
int main() {
	cin >> N;
	REP(i, N) cin >> C[i];
	int sum = 0; REP(i, N) sum += C[i];

	int ans = 0;
	REP(i, N) {
		if (C[i] * 10 <= sum) ans += 30;
	}
	cout << ans << endl;
}