#include <bits/stdc++.h>

using namespace std;

long countArray(int n, int k, int x) {
    return pow(k,n-2)-2*(pow(k,n-3))+pow(n-4,k)-(n-4)*(n-5)*k/2;
}

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