Definitely helpful if you draw a picture first.
Nice
The 1st and the 3rd test are incorrect
Super Easy
regexp trick
10401 Solvers
Get the area codes from a list of phone numbers
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1077 Solvers
Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.
791 Solvers
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