Introduction to Problem Solving Part - 1 | Lecture 1 | Intermediate DSA

🚀 Start practicing DSA for FREE on Ascensionix: https://www.ascensionix.com Welcome to your first step into Data Structures and Algorithms! In this lecture, we kick off our *Introduction to Problem Solving (Part 1)* series. If you've ever felt overwhelmed by coding logic or optimizing code, this module is built exactly for you. We break down the fundamentals step-by-step using interactive whiteboards, moving from basic counting of factors to structural optimizations. Don't just watch — head over to our platform to solve the accompanying mandatory assignments, check your Problem Solving Percentage (PSP), and start tracking your progress! 📌 Lecture Timestamps (Click to Jump): 00:00 - Welcome to Ascensionix & 3-Step Course Framework 01:45 - Intermediate DSA Lecture Agenda (7 Key Topics) 02:14 - Core Concept: What is a Factor? 02:44 - Interactive Quiz 1: Finding Factors of 24 03:30 - Interactive Quiz 2: Finding Factors of 10 04:10 - Critical Observations on Core Factors 05:15 - Coding a Brute-Force Solution [O(N) Time Complexity] 06:30 - Mathematical Time Complexity Proof (Why O(N) fails at 10^18) 08:35 - The Optimized Approach (Pairing Factors) 10:00 - Step-by-Step Factor Pairing Analysis (N = 24) 12:50 - Edge Case Breakdown (N = 100) 14:50 - Mathematical Proof for Optimized Bound [O(sqrt(N))] 15:43 - Writing the Optimized Loop Code 17:15 - Core Concept: What is a Prime Number? (The Two-Factor Rule) 18:35 - Interactive Quiz 3: Identifying Prime Numbers 20:05 - Optimized Prime Code (IsPrime Implementation) & Outro 💡 Connect & Learn With Us: 📅 Join our WhatsApp Channel for Notes: https://whatsapp.com/channel/0029Vb8J... 🌐 Official Website: https://www.ascensionix.com 💼 LinkedIn Page:   / ascensionix   Don't forget to like, share, and subscribe to Ascensionix for daily DSA challenges and interview prep!