Reads The Same Both Ways

A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

medium

Seniority

L5

Problem

Auditing free-text fields in a data export, you need the longest contiguous stretch of a string `s` that reads the same forwards and backwards. If several stretches tie for that maximum length, return the one with the smallest starting index.

Summary

Somewhere in the noise, a stretch that mirrors itself. Find the longest one.

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