#3240
Minimum Number of Flips to Make Binary Grid Palindromic II
medium · 25.5% accepted · 142 likes · top 4%
array · two pointers · matrix
Description
You are given an m x n binary matrix grid.
A row or column is considered palindromic if its values read the same forward and backward.
You can flip any number of cells in grid from 0 to 1, or from 1 to 0.
Return the minimum number of cells that need to be flipped to make all rows and columns palindromic, and the total number of 1's in grid divisible by 4.
Solution