#!/bin/python

import sys

def countArray(n, k, x):
    if n==3:
        if k>=x:
            return k-2
        else:
            return k-1
    elif n==4:
        mul=k-1
        if k>=x:
            l=k-1
        else:
            l=k
        return mul*l-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%1000000007