Submission

Score: 100

User: Pera

Problemset: Sigma Croissant

Language: cpp

Time: 0.002 second

Submitted On: 2025-09-04 08:47:52

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

long long fact(int n) {
    if (n == 0 || n == 1) return 1;
    return n * fact(n - 1);
}

int main() {
    int n; cin >> n;
    long long sum{0};

    for (int i = 1; i <= n; i++) {
        sum += fact(i);
    }

    cout << sum << '\n';

}