Problem 112. Remove the air bubbles
Given a matrix a, return a matrix b in which all the zeros have "bubbled" to the top. That is, any zeros in a given column should be moved to the top. The order of the remaining nonzero numbers in the column should be preserved.
Example 1
Input a = [ 1 2 3 0 4 5 6 0 0 ]
Output b is [ 0 0 0 1 2 3 6 4 5 ]
Example 2
Input a = [ 1 0 5 0 6 0 7 ]' Output b is [ 0 0 0 1 5 6 7 ]'
Example 3
Input a = [ 1 0 1 1 ] Output b is [ 1 0 1 1 ]
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Ngo Tien Sang
on 8 Jul 2021
nice question!
Nguyen Viet Dung
on 11 Aug 2021
good problem
Manideep Bharadwaj
on 15 Apr 2023
good analogy
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