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:
Back and Forth Rows
Sum the Infinite Series
Reindex a vector
Fill a zeros matrix
Raise Matrix to Power
Kaggle: Reverse Game of Life - Zoo of Stills and Oscillators
REPMAT Enhancement - Faster for Large Row Replication of Vector
Minimum Set (A+A)U(A*A) OEIS A263996
Solve Quadratic : No * - or key functions permitted
Chezz_015 : Simplified chess
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