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Recursion becomes easy once you understand what happens behind the scenes in the call stack. In this video, you'll learn ...

Recursion is powerful but risky if used blindly. Iteration is efficient but not always clean. In this video, you'll learn exactly when to ...

String recursion problems are extremely common in interviews. This video teaches you how to break strings into smaller ...

Backtracking becomes slow when you explore useless branches. In this video, you'll learn pruning techniques used in real ...

This is one of the most important foundations in DSA because it affects performance and correctness. We'll break it down with ...

Most people “memorize” recursion, but interviewers want clean logic. This video teaches the hypothesis / induction method to ...

This is the most important recursion pattern for backtracking. In this video, you'll learn the “pick or not pick” approach to generate ...

Big-O can feel confusing, but it doesn't have to be. In this video, you'll learn how to measure how fast your code grows as input ...

Grid backtracking problems are super common (maze paths, word search, island paths). This video teaches the exact template to ...