Problem: There are N balls placed in a row. AtCoDeer the deer is painting each of these in one of the K colors of his paint cans. For aesthetic reasons, any two adjacent balls must be painted in different colors.

Find the number of the possible ways to paint the balls.

Constraints

* 1≦N≦1000
* 2≦K≦1000
* The correct answer is at most 2^{31}-1.

Input

The input is given from Standard Input in the following format:


N K


Output

Print the number of the possible ways to paint the balls.

Examples

Input

2 2


Output

2


Input

1 10


Output

10

Solution (in JAVA):

Solution:
import java.util.*;
public class Main{
public static void main(String[]args){
Scanner sc=new Scanner(System.in);
  long n=Long.parseLong(sc.next());
  long a=Long.parseLong(sc.next());
  n-=1;
  long ans=a;
  for(int i=0;i<n;i++)ans*=(a-1);
  System.out.println(ans);
}
}