leetcode-162-寻找峰值

题目描述：

二分法：

class Solution:
    def findPeakElement(self, nums: List[int]) -> int:
        l, h = 0, len(nums) - 1
        while l <= h:
            m = (l + h) // 2
            if (not m or nums[m-1] < nums[m]) and (m == len(nums) - 1 or nums[m] > nums[m+1]):
                return m
            elif not m or nums[m] > nums[m-1]:
                l = m + 1
            else:
                h = m - 1