Submission

Score: 100

User: Name4mepls

Problemset: Sigma Croissant

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-14 11:50:29

#include <iostream>
using namespace std;

#define endl << endl
#define sp << " "
#define colon << ":"
#define ll long long
ll fac(ll num){
    if (num<=1) return 1;
    return num*fac(num-1);
}
int main(){
    ll sum=0,n;
    cin >> n;
    for(int i=1;i<=n;i++){
        sum+=fac(i);
    }
    cout << sum;
}