import java.math.BigInteger;

 import java.util.Scanner;

 public class Main {

     public static void main(String[] args) {

         Scanner cin = new Scanner(System.in);

         while (cin.hasNext()) {

             int n = cin.nextInt();

             int k = cin.nextInt();

             BigInteger[][] dp = new BigInteger[200][2];

             dp[1][0] = BigInteger.ZERO;

             dp[1][1] = BigInteger.valueOf(k - 1);

             for (int i = 2; i <= n; i++) {

                 dp[i][0] = dp[i - 1][1];

                 dp[i][1] = dp[i - 1][0].add(dp[i - 1][1]).multiply(

                         BigInteger.valueOf(k - 1));

             }

             BigInteger ans = dp[n][0].add(dp[n][1]);

             System.out.println(ans);

         }

     }

 }