Package g2301_2400.s2352_equal_row_and_column_pairs

Class Solution

java.lang.Object

g2301_2400.s2352_equal_row_and_column_pairs.Solution

public class Solution
extends Object

2352 - Equal Row and Column Pairs.<p>Medium</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_i, C_j)</code> <em>such that row</em> <code>R_i</code> <em>and column</em> <code>C_j</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><strong>Example 1:</strong></p> <p><img src="https://assets.leetcode.com/uploads/2022/06/01/ex1.jpg" alt="" /></p> <p><strong>Input:</strong> grid = [[3,2,1],[1,7,6],[2,7,7]]</p> <p><strong>Output:</strong> 1</p> <p><strong>Explanation:</strong> There is 1 equal row and column pair:</p> <ul> <li>(Row 2, Column 1): [2,7,7]</li> </ul> <p><strong>Example 2:</strong></p> <p><img src="https://assets.leetcode.com/uploads/2022/06/01/ex2.jpg" alt="" /></p> <p><strong>Input:</strong> grid = [[3,1,2,2],[1,4,4,5],[2,4,2,2],[2,4,2,2]]</p> <p><strong>Output:</strong> 3</p> <p><strong>Explanation:</strong> There are 3 equal row and column pairs:</p> <ul> <li> <p>(Row 0, Column 0): [3,1,2,2]</p> </li> <li> <p>(Row 2, Column 2): [2,4,2,2]</p> </li> <li> <p>(Row 3, Column 2): [2,4,2,2]</p> </li> </ul> <p><strong>Constraints:</strong></p> <ul> <li><code>n == grid.length == grid[i].length</code></li> <li><code>1 <= n <= 200</code></li> <li><code>1 <= grid[i][j] <= 10⁵</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	equalPairs(int[][] grid)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

equalPairs

public int equalPairs(int[][] grid)