Reverse String With Special Characters

MediumPython

Problem

Reverse a string without changing the position of special characters.

Treat letters and digits as reversible characters. Every other character, including spaces and punctuation, must remain at its original index.

Implement def reverse_string(s):, which accepts a string and returns the transformed string. The input contains ASCII letters, digits, and special characters.

Constraints

0 <= len(s) <= 10^5
s contains only ASCII letters, digits, spaces, and punctuation
The relative positions of all non-alphanumeric characters must remain unchanged

Function Signature

def reverse_string(s):

CodePython 3

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