题解 | 寻找峰值

#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
#
# @param nums int整型一维数组
# @return int整型
#
class Solution:
    def findPeakElement(self, nums: List[int]) -> int:
        # write code here
        n = len(nums)
        for i in range(n):
            left  = nums[i-1] if i > 0 else float('-inf')
            right = nums[i+1] if i < n-1 else float('-inf')
            if left < nums[i] and right < nums[i]:
                return i
        return -1