Change given string to number. (hint: there is already function)
Changing from ['1234'] to  is one of example
Please expand the test suite so that solutions like this do not work.
Which doors are open?
Increment a number, given its digits
Back to basics 11 - Max Integer
Swap two numbers
Analyze observation data
Calculate area of sector
Calculate geostrophic current
How to permute given 3d matrix?
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