#include <bits/stdc++.h>

using namespace std;

long countArray(int n, int k, int x) {
    long long int p=1;
    for(int i=1;i<=(n-4);i++)
    {
        p=(p*(k-1))%1000000007;
    }
    p=(p*((k-2)*(k-2)+k-1))%1000000007;
    return p;
}

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