896. 单调数列

 1 class Solution(object):
 2     def isMonotonic(self, A):
 3         """
 4         :type A: List[int]
 5         :rtype: bool
 6         """
 7         i = 1
 8         while i < len(A):
 9             if A[i] == A[i - 1]:
10                 i += 1
11             # 递增
12             elif A[i] > A[i - 1]:
13                 for j in range(i, len(A)):
14                     if A[j] < A[j - 1]:
15                         return False
16                 break
17             # 递减
18             elif A[i] < A[i - 1]:
19                 for j in range(i, len(A)):
20                     if A[j] > A[j - 1]:
21                         return False
22                 break
23         return True
24 
25 
26 if __name__ == ‘__main__‘:
27     solution = Solution()
28     print(solution.isMonotonic([-1, -1, -1, -9, 2]))