#include <stdio.h>
int main(void) {
int t,flag=1;
long long int x,y;
while(t--){
scanf("%lld %lld",&x
,&y
); flag=1;
if(x==0 && y==0){flag=1;}
else if(x==0){
if(y%2!=0){flag=0;}
}
else if(y==0){
if(x<0 && x%2!=0){flag=0;}
else if(x>0 && x%2==0){flag=0;}
}
else if(x>0){
if(x%2==0){
if(y%2!=0){flag=0;}
}
else if(x%2!=0){
if(y%2!=0){
if(y>0 && y>x){
flag=0;
}
else if(y<0){
y=y*(-1);
if(x<=y){flag=0;}
}
}
}
}
else if(x<0){
x=x*(-1);
if(x%2==0){
if(y<0 && y%2!=0){
y=y*(-1);
if(y>x)flag=0;}
}
else if(x%2!=0){
if(y%2!=0){flag=0;}
else if(y%2==0 && y>0 && y<x){flag=0;}
else if(y%2==0 && y<0){
y=y*(-1);
if(y<x){flag=0;}
}
}
}
else if(flag
==0){printf("NO\n");}
}//wh
return 0;
}
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