#include <bits/stdc++.h>

using namespace std;

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

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