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Quiz
Backtracking
Question 1 / 3
⏱ 00:00
What does the 'un-choose' (undo) step in backtracking accomplish?
A
It frees memory immediately
B
It restores state so the next sibling branch starts clean
C
It sorts the candidates
D
It memoizes the result
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Backtracking quiz — Learn · Aevrofy