Contains Duplicate 🚀 | NeetCode 250 Series | Problem 2 | C++ Easy DSA Explained || Anshul Codes

In this video, we solve Problem 2 of the NeetCode 250 series — Contains Duplicate using C++. This is one of the most important beginner-friendly problems that helps you understand how to use hash maps (unordered_map) for frequency counting. What you’ll learn: - How to detect duplicates in an array efficiently 🧠 - Using unordered_map in C++ for frequency counting ⚡ - Writing clean and optimized code 💻 - Time and space complexity ⏱️ GitHub Solution: Check out the full code here: https://github.com/ansh26748ar/neetcode-submissions/tree/main/Data%20Structures%20%26%20Algorithms/duplicate-integer My NeetCode 250 Playlist: https://www.youtube.com/playlist?list=PLg8SNZMEfdKSoWx1OVmigMd-TjCfYJ7Pc NeetCode 250 Original Playlist: https://neetcode.io/practice LeetCode Question Link: https://leetcode.com/problems/contains-duplicate/description/ Subscribe for more coding and DSA content 🚀 #ContainsDuplicate #NeetCode250 #DSA #Cpp #CPlusPlus #CodingInterview #LeetCode #DSAForBeginners #Programming #CodeWithMe #LearnCoding #UnorderedMap #HashMap #ProblemSolving #Tech #CodingJourney #SoftwareEngineering #InterviewPrep #AnshulCodes #EasyDSA 🚀