#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int a(int x,int y){ if(y==0){ return x+1; } else if(x==0){ return a(y-1,1); } else{ return a(y-1,a(y,x-1)); } } int main(){ int x,y; cin>>x>>y; cout<<a(x,y); return 0; }