Given an array, return the cumulative difference.
a = [ 1 3 5 7 ]
cumdiff = [ 1 2 1 -2 ]
Similar Triangles - find the height of the tree
Rotate a Matrix
Tiling a matrix
Check if equal
Length of a short side
Back to basics - mean of corner elements of a matrix
Broken numlock key, oppps !
Sum of diagonals elements of a matrix
Matrix multiplication across rows
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