Practice Longest Substring Without Repeat (9.4.2) - Apply Data Structures and Algorithms to Solve Real-World Programming Challenges
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Longest Substring Without Repeat

Practice - Longest Substring Without Repeat

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

Given the string 'pwwkew', what is the length of the longest substring without repeating characters?

💡 Hint: Look for the longest substring section without duplicate letters.

Question 2 Easy

In the string 'abcde', is it possible to have a substring without repeating characters?

💡 Hint: Consider the entire string and its unique characters.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the time complexity of the sliding window algorithm?

O(n^2)
O(n)
O(log n)

💡 Hint: Think about how many times each character can be accessed.

Question 2

Using a hash set helps in achieving which of the following?

True
False

💡 Hint: Consider how duplicates are detected in the substring.

2 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Given a long string of characters, find the longest substring without repeating characters and return it.

💡 Hint: Draw the string and visualize how the window expands and contracts.

Challenge 2 Hard

Create a comprehensive function to count the number of unique substrings of the longest length without repeating characters.

💡 Hint: Consider how to store substrings in a way that allows easy checking for uniqueness.

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Reference links

Supplementary resources to enhance your learning experience.