#include<bits/stdc++.h> using namespace std; int akm(int x,int y){ if(x==0)return y+1; else if(x>0&&y==0) return akm(x-1,1); else if(x>0&&y>0) return akm(x-1,akm(x,y-1)); } int main(){ int n,m; cin>>n>>m; cout<<akm(n,m); return 0; }