#include<bits/stdc++.h>
using namespace std;
int n, ans;
int a[100005];
int main() {
	cin >> n;
	for (int i = 1; i <= n; i++) cin >> a[i];
	sort(a + 1, a + n + 1);
	reverse(a + 1, a + n + 1);
	for (int i = 1; i <= n; i++) {
		ans += a[i];
		for (int j = i + 1; j <= n; j++) {
			if (a[j] == 1) break;
			a[j] = sqrt(a[j]);
		}
	}
	cout << ans;
}