Pattern 22: LeetCode Interview Patterns24 sections · 736 units
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Quiz: Backtracking Essentials

Test your understanding

Check Your Understanding

In backtracking for permutations, what must you do after recursing on a choice?

  1. A.Nothing - the recursion handles everything
  2. B.Mark the choice as permanently used
  3. C.Clear all choices and start over
  4. D.Undo the choice to restore the previous state
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