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1072. Flip Columns For Maximum Number of Equal Rows

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Description

Given a matrix consisting of 0s and 1s, we may choose any number of columns in the matrix and flip every cell in that column.  Flipping a cell changes the value of that cell from 0 to 1 or from 1 to 0.

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

 

Example 1:

Input: [[0,1],[1,1]]

Output: 1

Explanation: After flipping no values, 1 row has all values equal.

Example 2:

Input: [[0,1],[1,0]]

Output: 2

Explanation: After flipping values in the first column, both rows have equal values.

Example 3:

Input: [[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.

 

Note:

1. 1 <= matrix.length <= 300
2. 1 <= matrix[i].length <= 300
3. All matrix[i].length's are equal
4. matrix[i][j] is 0 or 1

Solutions

Python3

Java

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