#include<bits/stdc++.h>
using namespace std;
int a[100005];
int main() {
	int n;
	scanf("%d", &n);
	for (int i = 1; i <= n; i++) {
		scanf("%d", &a[i]);
	}
	sort(a + 1, a + n + 1);
	reverse(a + 1, a + n + 1);
	long long ans = 0;
	for (int i = 1; i <= n; i++) {
		int day = i - 1;
		while (day > 0) {
			day--;
			a[i] = (int)sqrt(a[i]);
			if (a[i] == 0) {
				break;
			} 
		}
		ans += a[i];
	}
	printf("%lld", ans);
	return 0;
}