In this beginner-friendly video, we kick off our Blind 25 Backtracking Series with one of the most classic problems: Combination Sum.
You’ll learn not just how to solve it — but why each step works.
📌 Problem:
Return all unique combinations of candidates where the numbers sum up to the target. Numbers may be used multiple times.
🔗 Full article with explanation & code:
https://codewithmagesh.tech/article/combination-sum
00:00 - Introduction
01:23 - Problem Statement: Combination Sum
05:45 - Backtracking Explained: Core Concepts
07:40 - Three Golden Rules of Backtracking
11:30 - Applying the Golden Rules to Combination Sum
16:45 - Approach: Recursion Tree and Dry Run
27:25 - Pseudo Code
31:35 - Time and Space Complexity
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