23 lines
531 B
Python
23 lines
531 B
Python
"""
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Author: dreamkong
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"""
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from typing import List
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def bsearch(nums: List[int], target: int) -> int:
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return bsearch_internally(nums, 0, len(nums)-1, target)
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def bsearch_internally(nums: List[int], low: int, high: int, target: int) -> int:
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if low > high:
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return -1
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mid = low+int((high-low) >> 2)
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if nums[mid] == target:
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return mid
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elif nums[mid] < target:
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return bsearch_internally(nums, mid+1, high, target)
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else:
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return bsearch_internally(nums, low, mid-1, target)
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