Recursion & Backtracking – Complete DSA Playlist This playlist is designed to help you understand recursion from scratch and build strong problem-solving intuition step by step. Instead of memorizing solutions, you will learn how to identify recursion patterns, how to think recursively, and when to use backtracking effectively. ✅ What you’ll learn: Basics of recursion and recursive thinking How to design recursive solutions Recursion templates used in coding interviews Backtracking patterns (choices → constraints → exploration) Dry runs and visualization techniques Common mistakes and optimization tips 📌 Topics covered: Recursion fundamentals Base case & recursive case design Stack flow visualization Subsets, permutations, combinations N-Queens, Sudoku, and classic backtracking problems Interview-level problems from LeetCode & GFG 🎯 Ideal for: Beginners in DSA Students preparing for coding interviews Anyone struggling to understand recursion intuitively By the end of this playlist, you’ll be able to recognize recursion patterns instantly and solve problems with confidence. Subscribe and start mastering recursion today! 🔥
Curated by: Padho with Pratyush (9 videos)
Master the Combination Sum problem using the Recursion and Backtracking pattern! If you've been struggling with how to build the recursion tree or manage the base cases, this visual, step-by-step breakdown will make it click. Welcome back to the complete DSA Pattern series. In this lecture, we tackle LeetCode 39 (Combination Sum), diving deep into how to identify the backtracking pattern, write the code, and optimize the time and space complexity. 📌 What you will learn in this video: Understanding the Combination Sum problem statement How to draw the complete Recursion Tree Identifying the base cases and edge cases Step-by-step code implementation Time and Space Complexity analysis 💻 Problem Link: https://leetcode.com/problems/combination-sum/description/ People coming for first time https://www.youtube.com/watch?v=ks-aCN8dzv0 DSA Patterns Playlist: https://www.youtube.com/playlist?list=PLbJhGqY-mq47k_WLUtzVjmarUm1EuXPj2 Find the pattern sheet here: https://docs.google.com/spreadsheets/d/1T5-nGsJ9WNwna44e9WWRD0jlZIT5KxVOGvylcvvVrY8/edit?usp=sharing Don't forget to drop a like if this helped you understand recursion better, and subscribe to follow along with the full DSA pattern series! Let me know in the comments which problem you want to see next.