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:
Decode a simplified barcode
Make a 1 hot vector
Length of a short side
PONG 003: 3-Ball Rectangle, Interactive Download
Minimum Distance between two N-sided Polygons
Binpack Contest: Retro - - Best Packing
Gene Sequence Contest: Retro
Slitherlink II: Gimmes
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