Submission

Score: 100

User: un8qe_x3

Problemset: Sigma Croissant

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-21 17:58:18

#include<bits/stdc++.h>
#define ll long long
#define For(i,j,n) for(int i=j;i<n;i++)
using namespace std;
ll fac(int a){ll b=1;For(iiii,1,a+1){b *= iiii;}return b;}
int main(){int a;cin >> a;ll b=0;For(i,1,a+1){b += fac(i);}cout << b;}