Practice Problem Description - 43.1.2 | 43. Longest common subsequence - Part A | Data Structures and Algorithms in Python
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Practice Questions

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Question 1

Easy

Define the Longest Common Subsequence in your own words.

πŸ’‘ Hint: Think about characters that can match in both sequences.

Question 2

Easy

What is a brute force algorithm?

πŸ’‘ Hint: Consider how you would test every possible pair.

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Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does LCS stand for?

  • Longest Common Substring
  • Longest Common Subsequence
  • Longest Common Structure

πŸ’‘ Hint: Think about which option describes sequence relationships.

Question 2

The time complexity of the brute force LCS algorithm is?

  • O(n)
  • O(nΒ²)
  • O(nΒ³)

πŸ’‘ Hint: Consider how many checks are being made for every possible character pairing.

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Challenge Problems

Push your limits with challenges.

Question 1

Given strings 'ABCDEF' and 'AEBDF', find the LCS and describe the steps taken.

πŸ’‘ Hint: Focus on keeping track of matches as you compare.

Question 2

Discuss the implications of LCS in natural language processing.

πŸ’‘ Hint: Consider how identifying common phrases can improve understanding.

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