dsa5 min read
Arrays & Strings Complete — 100-Problem Master Cheatsheet
Master cheatsheet of all 100 Arrays & Strings problems: patterns, time/space complexity, and MAANG company tags in one place.
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Patterns
15 articles
dsa5 min read
Binary Search — Complete Guide: All Patterns & Problem Index
Master every binary search pattern: classic, left/right boundary, rotated array, BS on answer, and 2D matrix — with templates and full index of 45 problems.
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dsa4 min read
Binary Search Master Recap — All Patterns & Templates
Complete cheatsheet for Binary Search: all 7 patterns, the universal template, BS on answer guide, Big O reference, and MAANG priority.
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dsa5 min read
Hashing & Maps — Complete Guide (Problems 161–205)
Master HashMap, HashSet, and cache design patterns with 45 problems, 5-language solutions, and MAANG company tags.
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dsa5 min read
Hashing & Maps Master Recap — All Patterns & Templates
Complete cheatsheet for Hashing & Maps: all 7 patterns, Big O reference, template code, and MAANG priority guide.
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dsa5 min read
Linked Lists — Complete Guide: All Patterns & Problem Index
Master every linked list pattern: reverse, two pointers, cycle detection, merge, clone, and design problems — with templates and full index of 45 problems.
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dsa5 min read
Linked Lists Master Recap — All Patterns & Templates
Complete cheatsheet for Linked Lists: all 7 patterns, template code, Big O reference, and MAANG interview priority guide.
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dsa5 min read
Stacks & Queues — Complete Guide: All Patterns & Problem Index
Master every stack and queue pattern: monotonic stack, BFS, two-stack tricks, deque, and design — with templates and full index of 50 problems.
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dsa5 min read
Stacks & Queues Master Recap — All Patterns & Templates
Complete cheatsheet for Stacks & Queues: all 7 patterns, template code, Big O reference, and MAANG interview priority guide.
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dsa6 min read
Trees — Complete Guide: All Patterns & Problem Index
Master every tree pattern: DFS traversals, BFS level-order, BST operations, LCA, path sum, and serialization — with templates and full index of 75 problems.
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dsa7 min read
Two Pointers & Sliding Window — Complete Guide (Problems 101–160)
Master Two Pointers and Sliding Window patterns with 60 problems, 5-language solutions, and MAANG company tags.
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dsa4 min read
Two Pointers & Sliding Window — Master Cheatsheet (Problems 101–160)
Complete cheatsheet of Two Pointers and Sliding Window patterns with template code, problem index, and MAANG priority list.
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dsa5 min read
Recursion & Backtracking Master Recap: Interview Cheatsheet
Complete backtracking reference: universal template, 7 pattern recognition cues, complexity guide, and top 30 interview problems.
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dsa3 min read
Number Sequences: Fibonacci Variants and Mathematical Patterns
Explore classic number sequences: Fibonacci, Lucas, Pell, tribonacci, with DP and matrix approaches.
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dsa4 min read
System Design DSA — Master Recap & Pattern Cheatsheet
Complete recap of all 20 system design DSA problems: pattern classification, time complexities, key data structures, and decision framework for choosing the right design approach.
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