View Code of Problem 4039

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	int a[n];long long sum=0,d=0;
	for(int i=0;i<n;++i)
		scanf("%d",&a[i]);
	sort(a,a+n);
	for(int i=0;i<n;++i){
		sum+=d;
		d+=a[i];
	}
	cout<<sum/n;
	return 0;
}