import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    static long countArray(int n, int k, int x) {
        long temp=1;
        if(n==3){
            temp=k-2;
        }
        else{
       for(int i=1;i<n-2;i++){
            temp=(temp%1000000007)*((k-1)%1000000007);
        }
            temp=(temp%1000000007)+((k-2)%1000000007);
       }
        return temp;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int k = in.nextInt();
        int x = in.nextInt();
        long answer = countArray(n, k, x);
        System.out.println(answer);
        in.close();
    }
}