Flip Columns For Maximum Number of Equal Rows

Try to solve the Flip Columns For Maximum Number of Equal Rows problem.

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Statement

Given an m×nm \times n binary matrix, matrix, return the maximum number of rows where all values become identical after flipping any number of columns. Flipping a column means changing every 00 to 11 and every 11 to 00 in that column.

Constraints:

  • m==m == matrix.length

  • n==n== matrix[i].length

  • 1≤m,n≤501 \leq m, n \leq 50

  • matrix[i].length is either 00 or 11.

Examples

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