백준 10872번

원본 : www.acmicpc.net/problem/10872

10872번: 팩토리얼

 

풀이

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {

	public static void main(String[] args) throws Exception {

		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(System.out));

		int n  = Integer.parseInt(reader.readLine());
		
		writer.write(String.valueOf(caculate(n)));

		writer.flush();
	}
	
	public static int caculate(int n) {
		if (n == 0 || n == 1) {
			return 1;
		} else {
			return n * caculate(n - 1);
		}
	}
	
}