Remove the middle element of a vector?
[1,2,3] should return 2
[1,2,3,4] should return 2
 should return empty vector
Remove or return ?
keep it or remove it? confused example.
Back to basics 8 - Matrix Diagonals
Back to basics 23 - Triangular matrix
find the roots of a quadratic equation
Sum of diagonals elements of a matrix
Convert given decimal number to binary number.
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