Package g2301_2400.s2352_equal_row_and_column_pairs

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    2352 - Equal Row and Column Pairs\.

    Medium

    Given a 0-indexed n x n integer matrix grid, return the number of pairs <code>(R<sub>i</sub>, C<sub>j</sub>)</code> such that row <code>R<sub>i</sub></code> and column <code>C<sub>j</sub></code> 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 &lt;= n &lt;= 200

    • <code>1 <= gridj<= 10<sup>5</sup></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer equalPairs(Array<IntArray> grid)

      • Methods inherited from class java.lang.Object

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