The algorithm: 1. If remaining target is 0, add current combination to results 2. If remaining target is negative, return (prune) 3. For each candidate from start index onward: - Add candidate to current - Recurse with start = i (allow reuse) and target reduced by candidate - Remove candidate (backtrack) Sorting candidates first enables early termination.
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$ curl repovive.com/roadmaps/maang-interview-prep/backtracking/combination-sum-solution
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