2319. Check if Matrix Is X-Matrix

Easy

398

17

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

- All the elements in the diagonals of the matrix are
**non-zero**. - 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:trueExplanation: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:falseExplanation: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] <= 10`

^{5}

Accepted

40.2K

Submissions

60.6K

Acceptance Rate

66.3%

Seen this question in a real interview before?

1/4

Yes

No

Discussion (0)

Related Topics

Copyright ©️ 2023 LeetCode All rights reserved