What is the time complexity for LeetCode 78 subsets?

O(2^n * n)—2^n subsets, O(n) to build each.

How does backtracking work in LeetCode subsets?

Add current subset always, then for each remaining element, include it, recurse forward, pop to branch.

Yes, open it and step through—built for practice.

Subsets explode to 2^n possibilities—backtracking tames them. TraceLit's step-by-step traces turn recursion confusion into interview gold.

theAIcatchup Apr 09, 2026 3 min read

Backtracking generates all subsets by including/excluding each element systematically. 𝕏
TraceLit visualizes recursion, slashing learning curve for LeetCode 78. 𝕏
Bit manipulation offers non-recursive alternative with better constants. 𝕏

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#TraceLit #algorithm visualization #backtracking #leetcode-78 #subsets #subsets-algorithm #visual-tracing

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Originally reported by dev.to