#include <iostream>
using namespace std;
typedef long long LL;
int main(int argc, char* argv[])
{
	LL N,M;
	cin>>N>>M;
	if (N%2==0){
		if (M%2==0){
			cout<<"Yes"<<endl;
			return 0;
		}else{
			cout<<"No"<<endl;
			return 0;
		}
	}else{
		if (N>1){
			N=1;
		}
		if (10*M<100){
			cout<<"No"<<endl;
			return 0;
		}
		if ((10*M-100)%2==0){
			cout<<"Yes"<<endl;
		}else{
			cout<<"No"<<endl;
		}
	}

	return 0;
}