哪位大佬行行好，帮我看看吧！

#include<bits/stdc++.h>
using namespace std;
int main()
{
    long long x,y;
    cin>>x>>y;
    if(y==0)cout<<"NO"<<endl<<"YES"<<endl;//特判
	else{
		if(x>=0)cout<<"NO"<<endl;
		else{
			if(y%2==0)cout<<"N0"<<endl;
			else cout<<"YES"<<endl;
			
		}
		if(abs(x)%2==1)cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
	}
    return 0;
}