#!/bin/python

import sys

def countArray(n, k, x):
    # Return the number of ways to fill in the array.
    ans=0
    ans=pow(k-1,n-4)
    ans=ans*((k*k)-(3*k)+3)
    return ans
    

if __name__ == "__main__":
    n, k, x = raw_input().strip().split(' ')
    n, k, x = [int(n), int(k), int(x)]
    answer = countArray(n, k, x)
    print answer