編寫一個函數,其作用是將輸入的字符串反轉過來。輸入字符串以字符數組 char[]
的形式給出。
不要給另外的數組分配額外的空間,你必須原地修改輸入數組、使用 O(1) 的額外空間解決這一問題。
你可以假設數組中的所有字符都是 ASCII 碼錶中的可打印字符。
示例 1:
輸入:["h","e","l","l","o"] 輸出:["o","l","l","e","h"]
示例 2:
輸入:["H","a","n","n","a","h"] 輸出:["h","a","n","n","a","H"]
class Solution:
def reverseString(self, s: List[str]) -> None:
"""
Do not return anything, modify s in-place instead.
"""
s[::] = s[::-1]