#include <bits/stdc++.h>

using namespace std;

long countArray(int n, int k, int x) {
    int numberOfWays = 0;
    
    for (size_t i = 1; i < n-1; ++i){
       numberOfWays += k-1; 
    }
    
    numberOfWays--;
    
    return numberOfWays;
}

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