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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.
I solve it with using integer->string conversions, then without using integer->string conversions. But everytime a have Execution Timed Out (12000 ms)
But this solution return number without "," (commas)
I can understand how to do it. My function work with small number, but when the input number = 2**69 and higher, than it always return false and note "Exiting potential infinite loop". Who know what to do? I'm coding in JavaScript