problem344

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344. Reverse String (Easy)

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

 

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.

 

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

Related Topics

[Two Pointers] [String]

Similar Questions

1. Reverse Vowels of a String (Easy)
2. Reverse String II (Easy)

Hints

Hint 1

The entire logic for reversing a string is based on using the opposite directional two-pointer approach!