An $n imes n$ integer matrix is considered valid if every row and every column contains all the integers from $1$ to $n$ inclusive.

Given an $n imes n$ integer matrix matrix, return true if the matrix is valid, or false otherwise.

Constraints:

• n $=$ matrix.length $=$ matrix[i].length

• $1 \leq$ n $\leq 100$

• $1 \leq$ matrix[i][j] $\leq$ n

Now, let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Implement your solution in the following coding playground.