Amazon Product Code Permutations
Amazon Product Code Permutations
MediumRecursion0% accepted
Amazon generates all permutations of a product barcode string (unique characters). Given an array of distinct integers, return all possible permutations.
Approach
Generate all permutations of distinct integers using backtracking.
Input
3
1 2 3
Output
[[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]]
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