Pattern 22: LeetCode Interview Patterns24 sections · 736 units
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Quiz: Choosing the Right Data Structure

Test your understanding

Check Your Understanding

What data structure lets you quickly check if a character is already in your current substring?

  1. A.Array of booleans for each ASCII character
  2. B.Sorted list of characters
  3. C.Hash set or hash map
  4. D.Stack
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