#include<bits/stdc++.h>
using namespace std;
int m,n;
int ack(int m,int n){
	if(m==0)return n+1;
	else if(m!=0&&n==0)return ack(m-1,1);
	else return ack(m-1,ack(m,n-1));
}
int main(){
	cin>>m>>n;
	cout<<ack(m,n);
    return 0;
}
/**************************************************************
	Problem: 1695
	User: admin
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/