Given an m x n matrix, return true if the matrix is Toeplitz. Otherwise, return false.
A matrix is Toeplitz if every diagonal from top-left to bottom-right has the same elements.
\n\n\n
Example 1:
\n![\"\"](\"https://assets.leetcode.com/uploads/2020/11/04/ex1.jpg\")
\n\nInput: matrix = [[1,2,3,4],[5,1,2,3],[9,5,1,2]]\nOutput: true\nExplanation:\nIn the above grid, the diagonals are:\n"[9]", "[5, 5]", "[1, 1, 1]", "[2, 2, 2]", "[3, 3]", "[4]".\nIn each diagonal all elements are the same, so the answer is True.\n\n\n
Example 2:
\n![\"\"](\"https://assets.leetcode.com/uploads/2020/11/04/ex2.jpg\")
\n\nInput: matrix = [[1,2],[2,2]]\nOutput: false\nExplanation:\nThe diagonal "[1, 2]" has different elements.\n\n\n
\n
Constraints:
\n\nm == matrix.lengthn == matrix[i].length1 <= m, n <= 200 <= matrix[i][j] <= 99\n
Follow up:
\n\nmatrix is stored on disk, and the memory is limited such that you can only load at most one row of the matrix into the memory at once?matrix is so large that you can only load up a partial row into the memory at once?给你一个 m x n 的矩阵 matrix 。如果这个矩阵是托普利茨矩阵，返回 true ；否则，返回 false 。
如果矩阵上每一条由左上到右下的对角线上的元素都相同，那么这个矩阵是 托普利茨矩阵 。
\n\n\n\n
示例 1：
\n\n\n输入：matrix = [[1,2,3,4],[5,1,2,3],[9,5,1,2]]\n输出：true\n解释：\n在上述矩阵中, 其对角线为: \n\"[9]\", \"[5, 5]\", \"[1, 1, 1]\", \"[2, 2, 2]\", \"[3, 3]\", \"[4]\"。 \n各条对角线上的所有元素均相同, 因此答案是 True 。\n\n\n
示例 2：
\n\n\n输入：matrix = [[1,2],[2,2]]\n输出：false\n解释：\n对角线 \"[1, 2]\" 上的元素不同。\n\n
\n\n
提示：
\n\nm == matrix.lengthn == matrix[i].length1 <= m, n <= 200 <= matrix[i][j] <= 99\n\n
进阶：
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"exampleTestcases": "[[1,2,3,4],[5,1,2,3],[9,5,1,2]]\n[[1,2],[2,2]]",
"__typename": "QuestionNode"
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