Improved the Zero Out Matrix Python solution: - It is now possible for the rowHasZero and colHasZero lists to get updated less than m*n times. - Python's variable passing style is call-by-object (see: http://stackoverflow.com/a/9697367/2428123). - Thus, since lists (of lists) are mutable, we don't need to return A.
Improved the Zero Out Matrix Python solution:
- It is now possible for the rowHasZero and colHasZero lists to get updated less than m*n times.
- Python's variable passing style is call-by-object (see: http://stackoverflow.com/a/9697367/2428123).
- Thus, since lists (of lists) are mutable, we don't need to return A.

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