Week_1_Day_04.py

Q.) Write a function that reverses a string. The input string is given as an array of characters char[].

Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory.

You may assume all the characters consist of printable ascii characters.

 

Example 1:

Input: ["h","e","l","l","o"]
Output: ["o","l","l","e","h"]
Example 2:

Input: ["H","a","n","n","a","h"]
Output: ["h","a","n","n","a","H"]


This Approcah also think:  The entire logic for reversing a string is based on using the opposite directional two-pointer approach!


Solution.................................................................

class Solution:
    def reverseString(self, s: List[str]) -> None:
        s.reverse()

        """
        Do not return anything, modify s in-place instead.
        """