Added article for contains duplicate problem #4332

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BHUVANESH-SSN wants to merge 1 commit into neetcode-gh:main from BHUVANESH-SSN:article-contains-duplicate.md

BHUVANESH-SSN commented Jul 4, 2025

Summary

Added a detailed markdown article for the "Contains Duplicate" question
Includes 4 approaches: Brute Force, Sorting, Hash Set, and Set Size Comparison
Explained intuition, C++ code, time and space complexity
Matches NeetCode video logic

I'm interested in contributing more articles. Please let me know if there's a priority list or specific questions you'd like help with!


          Added article for contains duplicate problem

b704340

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