找不到错误，分数越改越低，求大佬指正！

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>

using namespace std;

long long y0,t;

int main(){
	cin>>y0>>t;
	if(!t) cout<<"NO"<<endl<<"NO";
	else{
		if(y0<0&&t%2!=0) cout<<"YES";
		else cout<<"NO";
		cout<<endl;
		if(!(y0%2==0)) cout<<"YES";
		else cout<<"NO";
	}
	return 0;
}