import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;
import java.util.Scanner;
import java.util.StringTokenizer;
 
public class exa {
	static class FastReader
    {
        BufferedReader br;
        StringTokenizer st;
 
        public FastReader()
        {
            br = new BufferedReader(new
                     InputStreamReader(System.in));
        }
 
        String next()
        {
            while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException  e)
                {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }
 
        int nextInt()
        {
            return Integer.parseInt(next());
        }
 
        long nextLong()
        {
            return Long.parseLong(next());
        }
 
        double nextDouble()
        {
            return Double.parseDouble(next());
        }
 
        String nextLine()
        {
            String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
        }
        
}
    public static int power(int x,int y, int p)
{
    int res = 1;      
    x = x % p;  
    while (y > 0)
    {
        if (y%2==1)
            res = (res*x) % p;
        y = y>>1;
        x = (x*x) % p;  
    }
    return res;
}
	public static void main(String a[])
	{
		FastReader sc=new FastReader();
		int n = sc.nextInt();
        int k = sc.nextInt();
        int x = sc.nextInt();
        long ans=k-1;
        int con=1000000007;
        ans=power(k-1,n-2,con);
        if(x==1)
		System.out.println((ans-(k-2)-1)%con);
        else
        	System.out.println((ans-(k-2))%con);	
		
	}
}