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CSES - HIIT Open 2017

HIIT Open 2017

Contest start:2017-05-27 11:00:00
Contest end:2017-05-27 16:00:00

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History
2017-05-27 11:02:29
Task:Algorithm
Sender:Game of Nolife
Submission time:2017-05-27 11:02:29
Status:READY
Result:ACCEPTED

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Code

#include <bits/stdc++.h>
#define F first
#define S second
#define X real()
#define Y imag()
using namespace std;
typedef long long ll;
typedef long double ld;

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	ll n;
	cin>>n;
	cout<<((n+2)*(n+1)*n)/6<<endl;
}