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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.
Invalid number of columns: expected 1 to equal 4
What does it mean? Why the test is checking something different that was told in the description?
What is an expected format of the result?
The only thing you should do it to memorize the whole table that contains Hamming Numbers so you don't recreate it every time.
DFS won't give you a fastest route to the specified field
This is a joke. Terrible solution.
Some solutions posted but other are incorrect, but they were able to pass the test.