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 answer=1;
        int b=n-2;
        if(b==1){
            if(x==1)
                return k-1;
            else
                return k-2;
        }
        else{
            for(int i=1; i<=b-2; i++){
                answer *= (k-1);
            }
            answer=answer*((k-2)*(k-2)+(k-1));
        }
        return answer;
    }
    
   /* static long fact(long a){
        if(a==1)
            return 1;
        else
            return a*fact(a-1);
    }
    */

    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();
    }
}