题目
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.
解题思路
只遍历m-1 * n-1的数组，遍历到i，j时判断和i+1，j+1 是否相等
代码
class Solution:
def isToeplitzMatrix(self, matrix: List[List[int]]) -> bool:
for i in range(len(matrix) - 1):
for j in range(len(matrix[0]) - 1):
if matrix[i][j] != matrix[i + 1][j + 1]:
return False
return True
