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:
Filter AC, pass DC
Read a Soroban Abacus
Is the Point in a Circle?
Add two numbers
Genome Sequence 003R: Sequence DNA of random positioned and flipped segments
GJam March 2016 IOW: Polynesiaglot Large
Graceful Graph: Wichmann Rulers
Knots Contest: Score (TestSuite)
Criss-Cross Verification: NHL
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