Problem

At Slack, a text utility needs to reverse user-provided strings for formatting tests. Write a function that takes a string and returns a new string with its characters in reverse order.

Formal Specification

• Input: A string s
• Output: A string containing the characters of s in reverse order

Your solution should handle letters, digits, spaces, punctuation, and Unicode characters as regular characters.

Examples

Example 1

Input: s = "hello"
Output: "olleh"

Explanation: The characters are returned in the opposite order.

Example 2

Input: s = "a b!"
Output: "!b a"

Explanation: Spaces and punctuation are reversed just like letters.

Constraints

• 0 <= len(s) <= 10^5
• s may contain uppercase and lowercase letters, digits, spaces, punctuation, and Unicode characters
• Return a new reversed string

A correct solution should run in linear time relative to the length of the string.