Array 1888 String 783 Hash Table 687 Dynamic Programming 577 Math 573 Sorting 446 Greedy 409 Depth-First Search 316 Binary Search 304 Matrix 252 Tree 242 Breadth-First Search 241 Bit Manipulation 236 Two Pointers 217 Prefix Sum 200 Heap Priority Queue 194 Simulation 177 Binary Tree 176 Stack 167 Counting 159 Graph 159 Sliding Window 149 Design 128 Enumeration 115 Backtracking 108 Union Find 86 Linked List 81 Ordered Set 71 Number Theory 69 Monotonic Stack 65 Segment Tree 61 Trie 57 Combinatorics 53 Bitmask 49 Queue 48 Recursion 47 Divide and Conquer 47 Memoization 42 Binary Indexed Tree 42 Geometry 40 Binary Search Tree 40 Hash Function 39 String Matching 36 Topological Sort 35 Shortest Path 34 Rolling Hash 30 Game Theory 28 Interactive 23 Data Stream 21 Monotonic Queue 18 Brainteaser 17 Doubly-Linked List 13 Randomized 12 Merge Sort 12 Counting Sort 11 Iterator 9 Probability and Statistics 7 Quickselect 7 Suffix Array 7 Bucket Sort 6 Line Sweep 6 Minimum Spanning Tree 5 Reservoir Sampling 4 Strongly Connected Component 3 Eulerian Circuit 3 Radix Sort 3 Rejection Sampling 2 Biconnected Component 1