#include<iostream> #include<cstdio> using namespace std; long long akm(long long x,long long 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 x,y; cin>>x>>y; cout<<akm(x,y); }