Longest Substring Without Repeating | Dataford Interview Questions

Solve the longest substring without repeating characters problem.

Implement length_of_longest_substring(s), which returns the maximum length of a contiguous substring containing no repeated characters. The input is a string, and the output is an integer.

Function Contract

Input: s, a string containing ASCII or Unicode characters
Output: the length of the longest substring with all unique characters

Constraints

0 <= len(s) <= 5 * 10^4
Characters may include ASCII or Unicode values
The substring must be contiguous

Function Signature

def length_of_longest_substring(s):

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Problem