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q0154.py
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q0154.py
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#!/usr/bin/python3
from typing import List
class Solution:
minVal = 0
flag = False
def finMinHelper(self, nums: List[int], left: int, right: int):
if left > right or self.flag:
return
if left == right:
if nums[left] < self.minVal:
self.minVal = nums[left]
return
mid = (left + right + 1) // 2
if nums[mid] < self.minVal:
self.minVal = nums[mid]
if nums[mid] < nums[mid - 1]:
self.flag = True
if nums[mid] == nums[right] == nums[left]:
self.finMinHelper(nums, left, mid - 1)
self.finMinHelper(nums, mid + 1, right)
elif nums[mid] >= nums[left] >= nums[right]:
self.finMinHelper(nums, mid + 1, right)
else:
self.finMinHelper(nums, left, mid - 1)
def findMin(self, nums: List[int]) -> int:
left = 0
right = len(nums) - 1
if nums[left] < nums[right]:
return nums[left]
self.flag = False
self.minVal = nums[0]
self.finMinHelper(nums, left, right)
return self.minVal
solu = Solution()
nums = [3,5,1]
result = solu.findMin(nums)
print(result)