这即是正解

print(1002185083)

#include <bits/stdc++.h>
#define int long long
using namespace std;
const int N = 1e5+5;
int n,sum;
signed main()
{
	cin>>n;
	int t;
	for(int i=1;i<=n;i++)
		cin>>t,sum+=t;
	cout<<sum*2/((n+1));
	return 0;
}