Submission

Score: 100

User: pete

Problemset: Sigma Croissant

Language: cpp

Time: 0.002 second

Submitted On: 2026-01-23 22:11:58

#include<bits/stdc++.h>

using namespace std;

int main(){
	int n;
	cin>>n;
	long long sum = 0;
	long long fact = 1;
	for(int i = 1;i<=n;i++){
		fact = fact*i;
		sum+=fact;
	}
	cout<<sum;
}