1072. Flip Columns For Maximum Number of Equal Rows

https://leetcode.com/problems/flip-columns-for-maximum-number-of-equal-rows

Description

You are given an m x n binary matrix matrix.

You can choose any number of columns in the matrix and flip every cell in that column (i.e., Change the value of the cell from 0 to 1 or vice versa).

Return the maximum number of rows that have all values equal after some number of 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.

Constraints:

• m == matrix.length

• n == matrix[i].length

• 1 <= m, n <= 300

• matrix[i][j] is either 0 or 1.

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