Submission

Score: 100

User: Karatat007

Problemset: Sigma Croissant

Language: cpp

Time: 0.003 second

Submitted On: 2026-10-08 11:16:15

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

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    long long fact[21]; 
    fact[0] = 1;
    for(int i = 1;i <= 20;++i) fact[i] = fact[i-1] * i; 
    int n;
    cin >> n;
    long long sum = 0;
    for(int i = 1;i <= n;++i) sum += fact[i];
    cout << sum;
}