#include <iostream> using namespace std; int a(int n,int m,int ni,int mi){ int x=0; if(n!=ni&&(ni+1)%2!=0&&mi%2!=0){ x+=a(n,m,ni+1,mi); } if(m!=mi&&ni%2!=0&&(mi+1)%2!=0){ x+=a(n,m,ni,mi+1); } if(ni==n&&mi==m){ return 1; } return x; } int main(){ int n,m; cin>>n>>m; cout<<a(n,m,1,1); return 0; }