#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
#define ALL(A) A.begin(), A.end()

using namespace std;

typedef long long ll;
typedef pair<int, int> P;

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int N; cin >> N;
	vector<int> C(N, 0);
	rep (i, N) cin >> C[i];

	int sum = accumulate(ALL(C), 0);

	int res = 0;
	rep (i, N){
		if (C[i] * 10 > sum) continue;
		res += 30;
	} // end rep

	cout << res << endl;

	return 0;
}