Submission

Score: 100

User: boss

Problemset: Sigma Croissant

Language: cpp

Time: 0.006 second

Submitted On: 2025-10-05 22:53:05

#include <bits/stdc++.h>
using namespace std;
long long fac(int d)
{
	long long a;
	if(d==1)
	{
		return 1;
	}
	a=d*fac(d-1);
	return a;
	
}
int main()
{
	int n;
	cin>>n;
	long long input=0;
	for(int i=1;i<=n;i++)
	{
		input+=fac(i);
	}
	cout << input;
	
	
	
	return 0;
}