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 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 and Description
Solution()

Method Summary

Modifier and Type	Method and Description
boolean	checkXMatrix(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

checkXMatrix

public boolean checkXMatrix(int[][] grid)