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