Given a pathname string, return a condensed version by replacing intermediate folders with '..'.
fullpath = 'C:\foo\bar\baz\qux';
shortpath = 'C:\..\qux';
Additional test cases have been added.
Prime factor digits
Increment a number, given its digits
Determine Whether an array is empty
Basic arrays operations.
Numeric array to cell array of strings (easy)
Find mistyped words in text (mixed-up letters)
Pentago: find winning move
Maximum of each diagonal
Minimum of each diagonal
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