Remove NaN ?
Construct an index vector from two input vectors in vectorized fashion
Generate a random matrix A of (1,-1)
Matrix multiplication across rows
Pernicious Anniversary Problem
The number of trailing zero digit of a factorial
Fractal: area and perimeter of Koch snowflake
Smallest n, for n! to have m trailing zero digits
Make a rainbow matrix (follow-up to checkerboard matrix)
Number of paths on a 3d grid
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