#include <bits/stdc++.h>
using namespace std;
bool cmp(int a,int b){
	return a > b;
}
int main(){
	int n,ans = 0,a[100005];
	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 = 2;j <= i;j++){
			a[i] = (int)sqrt(a[i]);
		}
		ans += a[i]; 
	}
	cout << ans;
	return 0;
}