[백준 조합] 팩토리얼 C++

https://www.acmicpc.net/problem/10872

10872번: 팩토리얼

#include <iostream>
#include <cmath>

using namespace std;

int factorial(int N)
{
    if(N == 1 || N == 0)
        return 1;
    
    return N * factorial(N - 1);
}
int main()
{
    int N = 0;
    cin >> N;
    cout << factorial(N) << endl;
   
    return 0;
}