Submission

Score: 100

User: pann

Problemset: Sigma Croissant

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-05 00:43:41

#include <iostream>
using namespace std;

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