Given a collection of integers that might contain duplicates, nums, return all possible subsets. Note: The solution set must not contain duplicate subsets.
public void backtrack(int[] nums, int from, int count, List<Integer> list, Set<List<Integer>> allList) { Output: [[1],[4,4,1],[],[4,4],[4],[4,4,4 ...
Backtracking has proven itself to be a universal algorithmic technique that can be applied while solving all kinds of computational problems, from the most primitive (such as counting all possible ...
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