What is LeetCode 46 Permutations?

Generate all possible arrangements of a distinct integer array using backtracking. Returns list of lists, any order OK. Classic interview staple.

How to solve LeetCode 46 with backtracking?

Use recursive function from start index. Swap current with each later, recurse, backswap. Copy array at full length.

Visual debugger tracing code line-by-line for problems like 46. Steps through swaps/recursion interactively.

🤖 AI Dev Tools

Swap. Recurse. Backtrack. Repeat until your brain melts. LeetCode 46's permutations problem hasn't changed, but the interview pressure has.

theAIcatchup Apr 09, 2026 4 min read

Backtracking uses in-place swaps to explore all permutations efficiently without duplicates. 𝕏
O(n! × n) time is brutal but unavoidable for exhaustive generation. 𝕏
Tools like TraceLit explain recursion visually, saving debug headaches. 𝕏

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#TraceLit #algorithm visualization #algorithm-visualizer #backtracking #coding interviews #leetcode-46 #permutations #recursion

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