Submission

Score: 100

User: hmmm

Problemset: Sigma Croissant

Language: cpp

Time: 0.003 second

Submitted On: 2025-08-21 13:20:52

#include<bits/stdc++.h>
using namespace std;

int main(){
    ios::sync_with_stdio(0); cin.tie(0);
    int n;
    cin >> n;
    long long int ans=0,diff=1;
    for(int i=1;i<=n;i++){
        diff*=i;
        ans+=diff;
    }
    cout << ans;
}