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1072. Flip Columns For Maximum Number of Equal Rows

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

Difficulty:

Medium

Lock:

Normal

Company:

Unknown

Problem Solution

1072-Flip-Columns-For-Maximum-Number-of-Equal-Rows

All Problems:

Link to All Problems
All contents and pictures on this website come from the Internet and are updated regularly every week. They are for personal study and research only, and should not be used for commercial purposes. Thank you for your cooperation.