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DIY: Longest Substring without Repeating Characters

Explore how to solve the problem of finding the longest substring without repeating characters in a given string. This lesson helps you implement an efficient Python function that returns both the longest substring and its length. Understand key techniques useful for interview problems and applications in computational biology.

Problem statement

In this coding example, you are given a string s. Your task is to find the longest substring without repeating characters. You also have to return the length of this longest substring.

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