Solution (leetcode-in-java 1.21 API)

java.lang.Object
- g2301_2400.s2352_equal_row_and_column_pairs.Solution

```
public class Solution
extends Object
```
2352 - Equal Row and Column Pairs.
Medium

Given a 0-indexed n x n integer matrix grid, return the number of pairs (R_i, C_j) such that row R_i and column C_j are equal.

A row and column pair is considered equal if they contain the same elements in the same order (i.e. an equal array).

Example 1:

Input: grid = [[3,2,1],[1,7,6],[2,7,7]]

Output: 1

Explanation: There is 1 equal row and column pair:
- (Row 2, Column 1): [2,7,7]
Example 2:

Input: grid = [[3,1,2,2],[1,4,4,5],[2,4,2,2],[2,4,2,2]]

Output: 3

Explanation: There are 3 equal row and column pairs:
- (Row 0, Column 0): [3,1,2,2]
- (Row 2, Column 2): [2,4,2,2]
- (Row 3, Column 2): [2,4,2,2]
Constraints:
- n == grid.length == grid[i].length
- 1 <= n <= 200
- 1 <= grid[i][j] <= 10⁵

- Constructor Summary
  
  Constructors
  Constructor Description
  
  Solution()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  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 Detail
- Solution
```
public Solution()
```

Method Detail

equalPairs

public int equalPairs(int[][] grid)