#include<bits/stdc++.h>
using namespace std;
int main(){
	long long a,b;
	cin>>a>>b;
	if(b==0){
		cout<<"NO"<<endl<<"YES";
		return 0;
	}
	if(a>=0){
		cout<<"NO"<<endl;
	}else{
		cout<<"YES"<<endl;
	}
	if(a%2==0){
		cout<<"NO"<<endl;
	}else{
		cout<<"YES"<<endl;
	}
    return 0;
}