#1072
Flip Columns For Maximum Number of Equal Rows
pupil · 460 · lc medium +26 · verified · 78.6% accepted · 1,344 likes · top 90%
Description
You are given an m x n binary matrix. You may flip every cell in any chosen subset of columns (changing 0 to 1 and vice versa).
Return the maximum number of rows that have all equal values after performing any number of such column flips.
Example 1:
Input: matrix = [[0,1],[1,1]]
Output: 1
Explanation: After flipping no values, 1 row has all values equal.
Example 2:
Input: matrix = [[0,1],[1,0]]
Output: 2
Explanation: After flipping values in the first column, both rows have equal values.
Example 3:
Input: matrix = [[0,0,0],[0,0,1],[1,1,0]]
Output: 2
Explanation: After flipping values in the first two columns, the last two rows have equal values.
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