#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define SZ(n) (int)(n).size()
using namespace std;
typedef long long ll;
typedef vector<int> VI;

int main() {
	int n;
	cin >> n;
	VI c;
	int t = 0;
	REP(i, n) {
		int a;
		cin >> a;
		c.push_back(a);
		t += c[i];
	}
	int ans = 0;
	REP(i, n) {
		if (c[i] <= t / 10) ans += 30;
	}
	cout << ans << endl;
	return 0;
}