Loading collection data...
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.
Yes, but m is constant and equal to 5.
How exactly is that so? This runs in O(N) time, if N is the length of the string. Also, in O(N) space, as it must store the result somewhere, which is O(N). This is the optimal complexity for this problem.
You may find solutions with better performance in practice, I agree, but not with better time complexity.