852. Peak Index in a Mountain Array

—Easy

https://leetcode.com/problems/peak-index-in-a-mountain-array/

Code:

 

class Solution:
    def peakIndexInMountainArray(self, A) -> int:
        ans_flag = False
        for i in range(len(A)-1):
            if A[i] > A[i+1]:
                break
        return i

# s = Solution()
# print(s.peakIndexInMountainArray([0,1,2,6,2,1,0]))

思路：

1.第一次错了是因为看成了判断是不是peak，没想到....