If the input is a negative number, generate an error. Otherwise, return the number.
Make a Palindrome Number
Back to basics 21 - Matrix replicating
Replace Vector Elements
Largest Twin Primes
Check if a directory is on the current MATLAB search path
The Python Challenge, Level 1: Decode strings
Find the maximal cliques in an undirected graph
Convert matrix to 3D array of triangular matrices
Check if vertices form a rectangle
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