#include <bits/stdc++.h>
using namespace std;
#define int long long
#define F(a,b,c) for(int a=b;a<=c;++a)
int ask(int m,int n){
	if(m==0) return n+1;
	if(n==0) return ask(m-1,1);
	return ask(m-1,ask(m,n-1));
} 
signed main()
{
	int x,y;
	cin>>x>>y;
	cout<<ask(x,y)<<"\n";
	return 0;
}