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

inline int read(){
	int x = 0,f = 1;char c = getchar();
	while(!isdigit(c)){if(c == '-')f = -1;c = getchar();}
	while(isdigit(c)){x = x*10 + c-'0';c = getchar();}
	return x*f;
}

int a[100005];

signed main(){
	int n = read(),sum = 0;
	for(int i = 1;i <= n;i++)a[i] = read();
	sort(a+1,a+n+1,greater<int>());
	for(int d = 1;d <= n;d++){
		int x = a[d];
		for(int i = 1;i < d;i++)x = sqrt(x);
		sum += x;
	}
	cout << sum;
	return 0;
}