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Feel free to propose a better one, although almost 1000 people solved it.
sorry but it doesen't make any sense the description
Thanks a lot. Cheers!
C Translation kumited, thanks.
You just didn't read carefully: the sum of all the waiting times of the customers. And then it is explained clearly in the note.
This comment is hidden because it contains spoiler information about the solution
You must accumulate all the waiting times: The first customer waits 5 minutes and the second waits 27 minutes. All this is in the description, please read it carefully, I'm not even sure I should answer you, I'm giving away the solution...
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
You must accumulate all the waiting times.
I really don't understand the description.
coffees = [20,5] -> 32
Cust 1 20 = 20
Cust 2 20+2+5 = 27 not 32
or
Cust 1 5 = 5
Cust 2 5+2+20 = 27 still not 32
Must be miss understanding something, or it's not clear, I'm missing a calculation or magic number?