Data Structures & Algorithms

Master core concepts with guided docs and AI explainers for difficult jargon.

Tier 1 -- Foundations

9 docs

Complexity

Amortized and Space Complexity5 min read · amortized-and-space-complexity
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Big-O and Complexity Analysis5 min read · big-o-and-complexity-analysis
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Hierarchical Structures

Binary Trees and BSTs5 min read · binary-trees-and-bsts
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Graphs and Representations5 min read · graphs-and-representations
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Heaps and Priority Queues5 min read · heaps-and-priority-queues
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Linear Structures

Arrays and Strings5 min read · arrays-and-strings
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Hash Tables5 min read · hash-tables
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Linked Lists5 min read · linked-lists
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Stacks and Queues4 min read · stacks-and-queues
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Tier 2 -- Patterns

31 docs
Backtracking Permutations and Subsets8 min read · backtracking-permutations-and-subsets
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Binary Search Fundamentals8 min read · binary-search-fundamentals
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Binary Search on Answer8 min read · binary-search-on-answer
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BST Operations8 min read · bst-operations
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Cache Design LRU and LFU9 min read · cache-design-lru-and-lfu
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Classic Greedy Problems12 min read · classic-greedy-problems
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DFS and BFS on Graphs9 min read · dfs-and-bfs-on-graphs
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Disjoint Set Union-Find9 min read · disjoint-set-union-find
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Greedy Fundamentals9 min read · greedy-fundamentals
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Hash Table Design8 min read · hash-table-design
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Heap and Two-Heap Median9 min read · heap-and-two-heap-median
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In-Place Array Partition8 min read · in-place-array-partition
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Interval Scheduling9 min read · interval-scheduling
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Merge Sort and Divide and Conquer8 min read · merge-sort-and-divide-and-conquer
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Monotonic Queue8 min read · monotonic-queue
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Monotonic Stack9 min read · monotonic-stack
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Number Theory Essentials8 min read · number-theory-essentials
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Prefix Sum8 min read · prefix-sum
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Quickselect and Top-K7 min read · quickselect-and-top-k
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Recursion Fundamentals8 min read · recursion-fundamentals
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Shortest Path Algorithms8 min read · shortest-path-algorithms
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Sliding Window8 min read · sliding-window
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String Matching Backtracking9 min read · string-matching-backtracking
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String Matching with KMP7 min read · string-matching-with-kmp
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Sweep Line9 min read · sweep-line
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Topological Sort9 min read · topological-sort
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Tree Path and Tree DP8 min read · tree-path-and-tree-dp
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Tree Serialization7 min read · tree-serialization
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Tree Traversal Patterns7 min read · tree-traversal-patterns
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Trie and Word Search8 min read · trie-and-word-search
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Two Pointers8 min read · two-pointers
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Tier 3 -- Dynamic Programming

9 docs
Counting and Bitmask DP9 min read · counting-and-bitmask-dp
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DP Fundamentals8 min read · dp-fundamentals
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Game Theory DP8 min read · game-theory-dp
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Grid and Coordinate DP8 min read · grid-and-coordinate-dp
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Interval DP8 min read · interval-dp
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Knapsack DP8 min read · knapsack-dp
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Partition DP8 min read · partition-dp
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Sequence DP8 min read · sequence-dp
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Tree DP8 min read · tree-dp
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