DIY: Longest Substring without Repeating Characters
Implement the findLongestSubstring function to discover the longest substring without repeating characters in a given string. Learn to handle edge cases, such as empty strings, and return the substring along with its length. This lesson builds skills essential for coding interviews by applying practical string manipulation techniques.
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Problem statement
In this coding example, you are given a string str. 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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