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leetcode-cn/problem (English)/相等行列对(English) [equal-row-and-column-pairs].html
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<p>Given a <strong>0-indexed</strong> <code>n x n</code> integer matrix <code>grid</code>, <em>return the number of pairs </em><code>(R<sub>i</sub>, C<sub>j</sub>)</code><em> such that row </em><code>R<sub>i</sub></code><em> and column </em><code>C<sub>j</sub></code><em> are equal</em>.</p>
<p>Given a <strong>0-indexed</strong> <code>n x n</code> integer matrix <code>grid</code>, <em>return the number of pairs </em><code>(r<sub>i</sub>, c<sub>j</sub>)</code><em> such that row </em><code>r<sub>i</sub></code><em> and column </em><code>c<sub>j</sub></code><em> are equal</em>.</p>
<p>A row and column pair is considered equal if they contain the same elements in the same order (i.e. an equal array).</p>
<p>A row and column pair is considered equal if they contain the same elements in the same order (i.e., an equal array).</p>
<p>&nbsp;</p>
<p><strong>Example 1:</strong></p>
<p><strong class="example">Example 1:</strong></p>
<img alt="" src="https://assets.leetcode.com/uploads/2022/06/01/ex1.jpg" style="width: 150px; height: 153px;" />
<pre>
<strong>Input:</strong> grid = [[3,2,1],[1,7,6],[2,7,7]]
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- (Row 2, Column 1): [2,7,7]
</pre>
<p><strong>Example 2:</strong></p>
<p><strong class="example">Example 2:</strong></p>
<img alt="" src="https://assets.leetcode.com/uploads/2022/06/01/ex2.jpg" style="width: 200px; height: 209px;" />
<pre>
<strong>Input:</strong> grid = [[3,1,2,2],[1,4,4,5],[2,4,2,2],[2,4,2,2]]