Contains Duplicate

Set membership versus sorting: time and space tradeoff.

Not attemptedLeetCodeEasy, unverified labelAccess: not determinedExtra, for review rotation

The exercise happens on LeetCode. Canonical link: https://leetcode.com/problems/contains-duplicate/. Link check: not checkable automatically (5 Oct 2026). Opened from this app 0 times; opening is not counted as an attempt.

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OutcomeAttempted, not solvedSolved with help (hints, editorial or discussion)Solved independentlyReviewed an earlier solution

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