<h2><a href="https://leetcode.com/problems/flip-columns-for-maximum-number-of-equal-rows/">1072. Flip Columns For Maximum Number of Equal Rows</a></h2><h3>Medium</h3><hr><div><p>You are given an <code>m x n</code> binary matrix <code>matrix</code>.</p>

<p>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 <code>0</code> to <code>1</code> or vice versa).</p>

<p>Return <em>the maximum number of rows that have all values equal after some number of flips</em>.</p>

<p>&nbsp;</p>

<p><strong class="example">Example 1:</strong></p>

<pre><strong>Input:</strong> matrix = [[0,1],[1,1]]

<strong>Output:</strong> 1

<strong>Explanation:</strong> After flipping no values, 1 row has all values equal.

</pre>

<p><strong class="example">Example 2:</strong></p>

<pre><strong>Input:</strong> matrix = [[0,1],[1,0]]

<strong>Output:</strong> 2

<strong>Explanation:</strong> After flipping values in the first column, both rows have equal values.

</pre>

<p><strong class="example">Example 3:</strong></p>

<pre><strong>Input:</strong> matrix = [[0,0,0],[0,0,1],[1,1,0]]

<strong>Output:</strong> 2

<strong>Explanation:</strong> After flipping values in the first two columns, the last two rows have equal values.

</pre>

<p>&nbsp;</p>

<p><strong>Constraints:</strong></p>

<ul>

<li><code>m == matrix.length</code></li>

<li><code>n == matrix[i].length</code></li>

<li><code>1 &lt;= m, n &lt;= 300</code></li>

<li><code>matrix[i][j]</code> is either&nbsp;<code>0</code> or <code>1</code>.</li>

</ul>

</div>