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.
