Test case 2 matrix is not symmetrical. Can't be the adjacency matrix of an undirected graph.
yes.. fixed it
Solve the set of simultaneous linear equations
Test if two numbers have the same digits
Basics: Divide integers to get integer outputs in all cases
Elements with highest local average
Fermat's last theorem - again
Signal Processing Basic - 1. Stretch a signal
Integer Sequence - II : New Fibonacci
longest common semi-substring
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