python 稀疏数组搜索
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python 稀疏数组搜索
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| 稀疏數組搜索
稀疏數組搜索。有個排好序的字符串數組,其中散布著一些空字符串,編寫一種方法,找出給定字符串的位置。示例1:輸入: words = ["at", "", "", "", "ball", "", "", "car", "", "","dad", "", ""], s = "ta"輸出:-1說明: 不存在返回-1。 示例2:輸入:words = ["at", "", "", "", "ball", "", "", "car", "", "","dad", "", ""], s = "ball"輸出:4 提示:words的長度在[1, 1000000]之間題解
class Solution:def findString(self, words: List[str], s: str) -> int:length = len(words)first = 0last = length - 1while last >= first:mid = first + (last-first)//2if words[mid] == s:return midelif words[mid] > s:last = mid - 1else:first = first + 1return -1總結
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