#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin >> n;
	long long a[n + 5],sum = 0;
	for(int i = 1;i <= n;i++){
		cin >> a[i];
	} 
	sort(a + 1,a + n + 1);
	for(int i = n;i >= 1;i--){
		for(int j = 0;j < n - i;j++){
			a[i] = (int)sqrt(a[i]);
		}
		sum += a[i];
	}
	cout << sum;
	return 0;
}