1161 : 하노이1

import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner scan = new Scanner(System.in);
         
        int n;
         
        n = scan.nextInt();
         
        f(n,1,2,3);
         
    }
     
    private static void f(int n, int s, int t, int e) {
        if (n <= 0) return;
        f(n - 1, s, e, t);
        System.out.println(n + " : " + s + " -> " +  e);
        f(n - 1, t, s, e);
    }
 
}

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