CODE EXAMPLE FOR PYTHON

mountain array leetcode

class Solution:
    def peakIndexInMountainArray(self, arr: List[int]) -> int:
        start = 0
        end = len(arr)-1
        
        while (start < end):
            mid = start + (end-start)//2
            if (arr[mid]>arr[mid+1]):
                end = mid
            else: start = mid+1
        return start