Hi there,

I solved the following Problem using $$$0-1$$$ bfs.

In the first submission 95671950 I got WA on test 7. I only changed the initial placement in the deque and got Accepted on this submission 95669200

Here is a picture that shows the comparison between the two submissions.

I suspect that the test data is weak (because both submission should get Wrong Answer Or both submission should get Accepted) or I am missing something about $$$0-1$$$ bfs.

If you can shed some light into this, I would be thankful.