#include <bits/stdc++.h>

using namespace std;

long countArray(int n, int k, int x) {
    long first,last,i,sum=1;
    long p=1000000007;
     for(i=1;i<=n-2;i++)
    {
       if(i!=n-2)
       {
           sum=(sum*(k-1))%p;
       }
        else
        {
            sum=(sum*(k-2))%p;
        }
    }
    return sum+1;
}

int main() {
    int n;
    int k;
    int x;
    cin >> n >> k >> x;
    long answer = countArray(n, k, x);
    cout << answer << endl;
    return 0;
}