Baekjoon 10872

문제 확인하기

#include <iostream>
using namespace std;

int factorial(int n) {
    if (n <= 1) {
        return 1;
    } else {
        return n * factorial(n-1);
    }
}

int main() {
    int num;
    cin >> num;
    cout << factorial(num);
    return 0;
}