/* 
 * author: malvedin
 */

import java.util.Scanner;

public class Ex1 {

public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int m = in.nextInt();
int n = in.nextInt();
System.out.println(ack(m, n));
}

public static int ack(int m, int n) {
if(m == 0) {return n + 1;}
else if(n == 0) {return ack(m - 1, 1);}
else {return ack(m - 1, ack(m, n - 1));}
}

}