Problem

In Greenhouse Software, text from a candidate note or job post may need simple character-level transformation. Write a function that takes a string and returns the same 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 function should preserve all characters exactly as they appear, including spaces, punctuation, and digits.

Examples

Example 1

• Input: s = "greenhouse"
• Output: "esuohneerg"
• Explanation: The characters are returned from the last character to the first.

Example 2

• Input: s = "Offer 2024!"
• Output: "!4202 reffO"
• Explanation: Letters, spaces, digits, and punctuation are all reversed as characters.

Constraints

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

Aim for a linear-time solution. Avoid unnecessary repeated string concatenation inside a loop if possible.