#include<iostream>
using namespace std;
int acm(int m,int n)
{
    if(n==0)
    {
        return n+1;
    }
    else if(m>0&&m==0)
    {
        return acm(n-1,1);
    }
    else
    {
        return acm(m-1,acm(m,n-1));
    }
}
int main()
{
    int a,b;
    cin>>a>>b;
    cout<<acm(a,b);
    return 0;
}