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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.
See above ;-)
Greedy solution work for 1,2,5-denominations.
I came up with a similar solution; quick question, though: why do you need
arr.length+1
in your ans array instead ofarr.length
?Shouldn't accept greedy solutions. Please improve test cases.