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:
Factorize THIS, buddy
Multiply to the limit?
Return the first and last character of a string
PACMAT - G03 Ghosts use minimum path to PACMAT; 3 Lives
Minimum Distance between two N-sided Polygons
Genome Sequence 003: DNA Sequence with random positioned segments
Top of the Hour : Return from your routine within 1 second of the hour
Mastermind II: Solve in 8 or less
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