Hi, here’s your problem today. This problem was recently asked by Microsoft:
Given an array of heights, determine whether the array forms a “mountain” pattern. A mountain pattern goes up and then down.
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class Solution(object):
def validMountainArray(self, arr):
# Fill this in.
print(Solution().validMountainArray([1, 2, 3, 2, 1]))
True
print(Solution().validMountainArray([1, 2, 3]))