[백준] 10872: 팩토리얼

10872번: 팩토리얼

#include <iostream>
#include <vector>
using namespace std;

unsigned int facto(int n) {
	if (n == 1 || n == 0) { return 1; }
	return n * facto(n - 1);
}

auto main()->int {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr); cout.tie(nullptr);
	int N; cin >> N;
	cout << facto(N) << endl;
}