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                **問題描述** 請實現一個算法,在不使用【額外數據結構和儲存空間】的情況下,翻轉一個給定的字符串(可以使用單個過程變量)。 給定一個 string,請返回一個 string,為翻轉后的字符串。保證字符串的長度小于等于 5000。 **解題思路** 翻轉字符串其實是將一個字符串以中間字符為軸,前后翻轉,即將 str\[len\]賦值給 str\[0\],將 str\[0\] 賦值 str\[len\]。 **源碼參考** ~~~ func reverString(s string) (string, bool) { str := []rune(s) l := len(str) if len > 5000 { return s, false } for i := 0; i < len/2; i++ { str[i], str[l-1-i] = str[l-1-i], str[i] } return string(str), true } ~~~ **源碼解析** 以字符串長度的 1/2 為軸,前后賦值
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