1. This solution is much faster on re-invocation than the one without the persistent num_ones variable. Unless of course it is performed on a much larger (than num_ones) array of 32-bit integer.
2. It is essential to have the statement
The reason for this is that the floor() function has a problem with precision. If can fail with 32-bit integer that are close to 2^32.
For instance, consider this Matlab code and system response:
Sorted highest to lowest?
Omit columns averages from a matrix
Specific Element Count
PACMAT - Ghosts Random; 3 Lives
Slitherlink IV: Recursive (medium size)
Binpack Contest: Retro
Find Index of maximum Value and maximum Value of a vector
Kaggle: Planetoid Game of Life - Variable Iterations for a wrapping array
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