#include<bits/stdc++.h>
#define int long long
using namespace std;
int n,sum = 0;
const int N = 100010;
int a[N];
int day = 0;
bool cmp(int x,int y){
	return x > y;
}
signed main(){
	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 <= day;j ++ ){
			a[i] = (int)sqrt(a[i]);
		}
		sum += a[i];
		day ++;
	}
	cout << sum << endl;
	return 0;
}