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 java.lang.Object
2352 - Equal Row and Column Pairs.

Medium

Given a 0-indexed n x n integer matrix grid, return the number of pairs (Ri, Cj) such that row Ri and column Cj 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

    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)