约 183 字小于 1 分钟...
数组
[[算法学习/代码随想录算法总结(C++)版本——数组、链表#704 二分查找]]
版本一）左闭右闭区间
class Solution:
def search(self, nums: List[int], target: int) -> int:
left, right = 0, len(nums) - 1
while left <= right:
middle = (left + right) // 2
if nums[middle] < target:
left = middle + 1
elif nums[middle] > target:
right = middle - 1
else:
return middle
return -1
（版本二）左闭右开区间
class Solution:
def search(self, nums: List[int], target: int) -> int:
left,right =0, len(nums)
while left < right:
mid = (left + right) // 2
if nums[mid] < target:
left = mid+1
elif nums[mid] > target:
right = mid
else:
return mid
return -1
