#!/bin/python3

import sys

def countArray(n, k, x):
    total = 1
    for i in range(n-3):
        total = total * (k-1)
    total = total + k - 2
    return total % (10**9 + 7)
    # Return the number of ways to fill in the array.

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