#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 5;
int n, a[N], sum;
bool cmp(int x, int y) {
	return x > y;
}
signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	cin >> n;
	for (int i = 1; i <= n; i++) cin >> a[i];
	sort(a + 1, a + n + 1, cmp);
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= i - 1; j++) a[i] = (int)sqrt(a[i]); 
		sum += a[i];
	}
	cout << sum;
	return 0;
}