#include <bits/stdc++.h>
using namespace std;

const int MAX = 1e5 + 10;
int a[MAX];

bool cmp(int a, int b) {
	return a > b;
}
int main() {
	int n;
	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	sort(a, a + 0 + n, cmp);
//	for (int i = 0; i < n; i++) {
//		cout << a[i] << " ";
//	}
	for (int i = 0; i < n ; i++) {
		int cnt = 0;
		while (cnt < i) {
			a[i] = (int)sqrt(a[i]);
			cnt++;
//			cout << "a[i]:"<<a[i]<<endl;
			
		}
	}
	int ans = 0;
	for (int i = 0; i < n; i++) {
		ans += a[i];
	}
	cout << ans;
	return 0;
}