#include<bits/stdc++.h>
using namespace std;
#define int long long
int n,a[100005],s;
signed main(){
	cin>>n;
	for(int i=1;i<=n;i++)scanf("%lld",&a[i]);
	sort(a+1,a+n+1);
	bool flag=0;
	for(int i=n;i>=1;i--){
		for(int j=1;j<=n-i&&a[i]>0;j++)a[i]=(int)(sqrt(a[i]));
		if(a[i]==0)break;
		s+=a[i];
	}
	printf("%lld",s);
	return 0;
}