Problem Solving Hub
Master algorithms and data structures with structured notes, tricks, interview questions, and hands-on programs—starting with C.
Your learning path
Algorithms, data structures & problem solving for students and interview prep
The Problem Solving Hub on Nikhil Learn Hub is a structured path through core computer science building blocks used in competitive programming, university courses, and technical interviews. Topics are organized from fundamentals (arrays and strings) through classic data structures such as linked lists, stacks, queues, trees, and graphs, plus search and sorting techniques and essential algorithm paradigms including greedy methods, divide and conquer, dynamic programming, backtracking, bit manipulation, and string pattern matching.
Each topic links to C language study material: concept notes, shortcut tricks, multiple-choice (MCQ) sets, short interview-style questions, simple programs, and dedicated problem-solving pages so you can move from theory to code. Use this hub alongside your own practice on paper or in an IDE to build fluency with time and space complexity, edge cases, and common patterns.