344. Reverse String. Sol

Official handling sol, It feels good not to distinguish between odd and even

Write a function that reverses a string. The input string is given as an array of characters s.

You must do this by modifying the input array in-place with O(1) extra memory.

Example 1:

Input: s = ["h","e","l","l","o"]
Output: ["o","l","l","e","h"]

Example 2:

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

Constraints:

• 1 <= s.length <= 105
• s[i] is a printable ascii character.

  class Solution:
      def reverseString(self, s):
          left, right = 0, len(s) - 1
          while left < right:
              s[left], s[right] = s[right], s[left]
              left, right = left + 1, right - 1