#!/bin/python

import sys

def countArray(n, k, x):
    # Return the number of ways to fill in the array.
    sum = 1
    for i in range(n-3):
        sum*=(k-1)
    return (2*sum*(k-2) - 1)
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