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.
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Thank you very much!
Sometimes ur list or "a" is empty or None because x is 0 therefore u need to consider that before returning the value. Hope this helps!
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First customer is waiting 5 minutes, second is waiting 5 (of first customer) + 2(maintanance) + 20(his own waiting time).
So accumulated time is 1 customer time(5) + 2 customer time(27) = 32
That only increase my paranoia...