{
  "id": 2398,
  "name": "check-if-matrix-is-x-matrix",
  "difficulty": "Easy",
  "link": "https://leetcode.com/problems/check-if-matrix-is-x-matrix/",
  "date": "2022-06-19",
  "task_description": "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:** 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`",
  "test_case": [
    {
      "label": "Example 1",
      "input": "grid = [[2,0,0,1],[0,3,1,0],[0,5,2,0],[4,0,0,2]]",
      "output": "true "
    },
    {
      "label": "Example 2",
      "input": "grid = [[5,7,0],[0,3,1],[0,5,0]]",
      "output": "false "
    }
  ],
  "constraints": [
    "n == grid.length == grid[i].length",
    "3 <= n <= 100",
    "0 <= grid[i][j] <= 105"
  ],
  "python_template": "class Solution(object):\n    def checkXMatrix(self, grid):\n        \"\"\"\n        :type grid: List[List[int]]\n        :rtype: bool\n        \"\"\"\n        ",
  "java_template": "class Solution {\n    public boolean checkXMatrix(int[][] grid) {\n        \n    }\n}",
  "metadata": {
    "func_name": "checkXMatrix"
  }
}