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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
First time to see a bfs implemented with while-loop and queue and the code is very delicate, Thanks.
It's a problem with the runner, this solution worked at some point but now it doesn't. Check the posts in Discourse, you're not the only one with that problem.
This comment is hidden because it contains spoiler information about the solution
I tried your solution, it reports
"STDERR
Execution Timed Out (12000 ms)"