Apple

4 articles

dsa2 min read

Find all unique combinations that sum to a target, using backtracking with candidate reuse allowed.

March 19, 2026Read →

dsa2 min read

Find all unique combinations that sum to target where each number may be used once, skipping duplicates at each recursion level.

March 19, 2026Read →

dsa2 min read

Find all unique quadruplets summing to target by extending the 3Sum pattern with an outer loop and duplicate skipping.

March 19, 2026Read →

dsa1 min read

Generate all unique subsets from an array with duplicates by sorting and skipping repeated elements at each recursion level.

March 19, 2026Read →