this is the test:
5
1
5 6
1
5 6
2
1 2
5 6
1
1 6
1
3 4
but this?
4
1
5 6
1
5 6
1
1 6
1
3 4
this should have the same answers, but my program gives Yes on the first one an No on the second.
Is it correct?
My program got WA on test 4.
if it's correct give me some wise tests if you know any...

WA4 is when some brick floats in the air and you output Yes.