#include <bits/stdc++.h>
#define int long long
using namespace std;
bool cmp(int a, int b){
	return a > b;
}
int ans;
signed main(){
	int n;
	cin >> n;
	int fruit[n];
	for (int i=0; i<n; i++){
		cin >> fruit[i];
	}
	sort(fruit, fruit+n, cmp);
	for (int i=0; i<n; i++){
		int y = fruit[i];
		for (int j = 0; j<i; j++){
			y =	(int)sqrt(y);
		}
		ans += y;
	}
	cout << ans;
	return 0;
}