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                字符串相關的問題在各大互聯網公司筆試面試中出現的頻率極高,比如微軟經典的單詞翻轉題:輸入“I am a student.”,則輸出“student. a am I”。 本章重點介紹6個經典的字符串問題,分別是旋轉字符串、字符串包含、字符串轉換成整數、回文判斷、最長回文子串、字符串的全排列,這6個問題要么從暴力解法入手,然后逐步優化,要么多種思路多種解法。 讀完本章后會發現,好的思路都是在充分考慮到問題本身的特征的前提下,或巧用合適的數據結構,或選擇合適的算法降低時間復雜度(避免不必要的操作),或選用效率更高的算法。
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