Package g2301_2400.s2319_check_if_matrix_is_x_matrix

Class Solution

java.lang.Object
g2301_2400.s2319_check_if_matrix_is_x_matrix.Solution
public class Solution extends java.lang.Object
2319 - Check if Matrix Is X-Matrix.

Easy

A square matrix is said to be an X-Matrix if both of the following conditions hold:

  1. All the elements in the diagonals of the matrix are non-zero.
  2. All other elements are 0.

Given a 2D integer array grid of size n x n representing a square matrix, return true if grid is an X-Matrix. Otherwise, return false.

Example 1:

Input: grid = [[2,0,0,1],[0,3,1,0],[0,5,2,0],[4,0,0,2]]

Output: true

Explanation: Refer to the diagram above.

An X-Matrix should have the green elements (diagonals) be non-zero and the red elements be 0.

Thus, grid is an X-Matrix.

Example 2:

Input: grid = [[5,7,0],[0,3,1],[0,5,0]]

Output: false

Explanation: Refer to the diagram above.

An X-Matrix should have the green elements (diagonals) be non-zero and the red elements be 0.

Thus, grid is not an X-Matrix.

Constraints:

  • n == grid.length == grid[i].length
  • 3 <= n <= 100
  • 0 <= grid[i][j] <= 105

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    checkXMatrix(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

    • checkXMatrix

      public boolean checkXMatrix(int[][] grid)