Unique Permutations
BACKTRACKING
ARRAY
Problem
Given an array nums of integers that might contain duplicates, return all possible unique permutations in any order.
Examples
permuteUnique([4,4,2]); // returns [[4,4,2],[4,2,4],[2,4,4]]
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Given an array nums of integers that might contain duplicates, return all possible unique permutations in any order.
permuteUnique([4,4,2]); // returns [[4,4,2],[4,2,4],[2,4,4]]