#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

long int countArray(int n, long long int k, int x) {
    if (n == 3)
    {
        if(x==1)
        {
            return k-1;
        }
        else
            return k-2;
    }
    else
    {
        long long int ans = 1;
        int i;
        for(i=1;i<=n-3;i++)
        {
            ans = (ans*(k-1))%(1000000007);
        }
        if(x > k)
        ans = (ans*(k-2))%1000000007;
        else
        {
            if(ans%k==0 || (k-1)%k ==0 )
            ans = ((ans*(k-1)*(k-1))/k)%1000000007;
            else
                ans = ((ans*(k-1)*(k-1))/k + 1)%1000000007;
        }
        return ans;
    }
    // Return the number of ways to fill in the array.
}

int main() {
    int n; 
    long long int k; 
    int x; 
    scanf("%i %lld %i", &n, &k, &x);
    long int answer = countArray(n, k, x);
    if (answer < 0)
        answer = 0;
    printf("%ld\n", answer);
    return 0;
}