public class Solution
extends Object
2133 - Check if Every Row and Column Contains All Numbers\.
Easy
An `n x n` matrix is **valid** if every row and every column contains **all** the integers from `1` to `n` ( **inclusive** ).
Given an `n x n` integer matrix `matrix`, return `true` _if the matrix is **valid**._ Otherwise, return `false`.
**Example 1:**
**Input:** matrix = \[\[1,2,3],[3,1,2],[2,3,1]]
**Output:** true
**Explanation:** In this case, n = 3, and every row and column contains the numbers 1, 2, and 3. Hence, we return true.
**Example 2:**
**Input:** matrix = \[\[1,1,1],[1,2,3],[1,2,3]]
**Output:** false
**Explanation:** In this case, n = 3, but the first row and the first column do not contain the numbers 2 or 3. Hence, we return false.
**Constraints:**
* `n == matrix.length == matrix[i].length`
* `1 <= n <= 100`
* `1 <= matrix[i][j] <= n`