#include <bits/stdc++.h>
#define M 1000000007

using namespace std;

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

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