done
```cpp
#include <bits/stdc++.h>
using namespace std;
int ax,ay,bx,by,n;
int gcd(int y,int x)
{
if(x==0)
{
return y;
}
else
{
return gcd(x,y%x);
}
}
int main()
{
cin>>n;
for(int i=1;i<=n;i++)
{
cin>>ax>>ay;
cin>>bx>>by;
int x=abs(bx-ax);
int y=abs(by-ay);
int re=gcd(y,x);
if(re==1)
{
cout<<"no"<<endl;
}
else
{
cout<<"yes"<<endl;
}
}
return 0;
}
```
by toolong114514 @ 2023-07-31 10:10:25
谢谢大佬！
by xxxxx_ @ 2023-07-31 16:27:22