![LeetCode - 217. Contains Duplicate || [Python] ✅ || Beginner-Friendly Logic || Fully Explained](https://i.ytimg.com/vi/ZFo1KqQo6HE/mqdefault.jpg)
![Contains Duplicate - Python Solution [Leetcode 217]](https://i.ytimg.com/vi/M-ih-AbRuF8/mqdefault.jpg)
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Last Updated: October 31, 2026
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