You are given a square of side length L, find D the length of its diagonal.
Back to basics 22 - Rotate a matrix
Length of a short side
Multiply by 3
Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.
Performance - summation
Area of polygon
Remove collinear points in a set of 2D points defining a polygon
Probabilities - Balls and urns - 01
Non trivial identities - differentiation
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