Set Matrix Zeroes
Problem
Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.
Example
Given a matrix
[
[1,2],
[0,3]
],
return
[
[0,2],
[0,0]
]
Challenge
Did you use extra space?
A straight forward solution using O(mn) space is probably a bad idea.
A simple improvement uses O(m + n) space, but still not the best solution.
Could you devise a constant space solution?