#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)



int N;
int C[100];
//-----------------------------------------------------------------
int main()
{
	cin >> N;
	rep(i, 0, N) scanf("%d", &C[i]);
	
	int sum = 0;
	rep(i, 0, N) sum += C[i];

	int ans = 0;
	rep(i, 0, N) if (C[i] * 10 <= sum) ans += 30;

	cout << ans << endl;
}