Mediumbacktracking
Permutations
TIME: O(n! * n)
SPACE: O(n)
Problem Statement
Given an array nums of distinct integers, return all the possible permutations. You can return the answer in any order.
Real Engineering Applications
In production systems, this concept directly maps to caching index layers, route lookups optimizations, compiler scope parsing validations, and multi-thread dependency schedulers.
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solution.js
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