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.

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Example 1:

Input: matrix = [[1,2,3],[3,1,2],[2,3,1]]Output: trueExplanation: 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: falseExplanation: 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.

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Constraints:

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

• 1 <= n <= 100

• 1 <= matrix[i][j] <= n

Accepted

48,367

Submissions

91,720

Easy 題目，有點不值一提了。loop2個方向，如果有問題就false，沒問題就返回true；

Runtime:?18 ms, faster than?83.24%?of?Java?online submissions for?Check if Every Row and Column Contains All Numbers.

Memory Usage:?43.3 MB, less than?78.96%?of?Java?online submissions for?Check if Every Row and Column Contains All Numbers.