Problem
Given a string s, return a new string containing the characters of s in reverse order. Solve the problem without using Python's built-in reverse helpers such as slicing with [::-1], reversed(), or converting directly through convenience methods that already perform the reversal.
Constraints
- 0 <= len(s) <= 10^5
- s may contain letters, digits, spaces, and punctuation
- Do not use built-in reverse helpers such as slicing with
[::-1]orreversed()
Function Signature
def reverse_string(s):
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