import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class MainTest {

    static long countArray(int n, int k, int x) {
        int[] array = new int[n];
        array[0] = 1;
        array[n-1] = x;
        long count = 1;
        
        for(int i = 0; i <n-1; i++){
            array[i] = i;
        }
        
        for(int i = 0; i<n; i++){
            for(int j = 1; j<=k; j++){
                array[i] = j;
                
                if(!(i-1<0 || i+1>=n)){
                    if(array[i] != array[i-1] && array[i] != array[i+1]){
                        count++;
                    }
                }
            }
        }
        
        return count;
    }
    

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int k = in.nextInt();
        int x = in.nextInt();
        long answer = countArray(n, k, x);
        System.out.println(answer);
        in.close();
    }
}