📄️ Data Structures Reference
All common data structures across C++, Java, Python, and C# — syntax only, no algorithms.
📄️ Introduction to DSA
A complete reference guide with C++ and Java code examples, pattern recognition strategies, and interview tips.
📄️ Big-O & Complexity Analysis
Understanding complexity is the first skill you need. Every solution must be analyzed for time and space usage.
📄️ Arrays & Strings
Arrays are the most fundamental data structure. Mastering array techniques unlocks most interview problems.
📄️ Recursion, Searching & Sorting
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📄️ Linked List, Stack, Queue & Hashing
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📄️ Trees, Heap & Trie
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📄️ Graphs
A graph is a collection of nodes (vertices) connected by edges. Graphs model networks, maps, dependencies, and relationships.
📄️ Dynamic Programming & Greedy
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📄️ Bit Manipulation & Advanced Topics
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📄️ Pattern Recognition — Interview Guide
This is the most critical skill in interviews. Given an unknown problem, you need to quickly identify which pattern to apply. Here's a systematic guide.
📄️ DSA Quick Reference Cheatsheet
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