LeetCode Easy Problems Explained | Two Sum, Happy Number, Contains Duplicate II | Python DSA

Описание: In this video, we solve and explain three popular LeetCode Easy problems step-by-step using Python:
1️⃣ Two Sum
2️⃣ Happy Number
3️⃣ Contains Duplicate II

We’ll discuss brute-force vs optimized approaches, time complexity, and how to think like an interviewer.
Perfect for beginners preparing for coding interviews or brushing up on problem-solving with hash maps and sets.

📚 Topics Covered:
HashMap / Dictionary usage
Set-based lookups
Sliding Window concept
Time and Space Complexity analysis

🤖 AI & ML with real-world projects
🧠 LangChain, RAG, and LLMs
⚙️ n8n Automation Workflows
📊 Data Analysis & Visualization
🔧 Embedded to Intelligent Systems Transition

🔍 Channel Keywords:
alex tech projects, python, data analysis, machine learning, data science, deep learning, LLMs, LangChain, statistics, SQL, data scientist, artificial intelligence, generative AI, upwork freelancer, automation, fastapi, real-world AI projects, embedded systems, AI tutorials
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🏷️ Hashtags:
#Python #DataAnalysis #MachineLearning #DeepLearning #GenerativeAI #LangChain #LLMs #Automation #DataScience #RAG #AIProjects #ArtificialIntelligence #SQL #Statistics #FastAPI #TechTutorials #n8n #EmbeddedSystems #OpenAI #AlexTechProjects
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