#include<iostream>
#include<cstdio>
#include<string>
#include<cstring>
#include<algorithm>
#include<queue>
#include<map>
#include<vector>
#include<set>
#include<cmath>
using namespace std;
int main()
{
	long long y,t,ans;
	cin>>y>>t;
	if(t==0)
	{
		cout<<"NO"<<"\n"<<"YES";
		return 0;
	}
	if(y<0) cout<<"YES"<<"\n";
	else cout<<"NO"<<"\n";
	if(y%2!=0) cout<<"YES"<<"\n";
	else cout<<"NO"<<"\n";	
	return 0;
}