https://github.com/omarbazaraa/competitive-programming
A collection of useful data structures and algorithms for competitive programming.
https://github.com/omarbazaraa/competitive-programming
algorithms competitive-programming data-structures graphs string-matching
Last synced: about 1 month ago
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A collection of useful data structures and algorithms for competitive programming.
- Host: GitHub
- URL: https://github.com/omarbazaraa/competitive-programming
- Owner: OmarBazaraa
- Created: 2018-07-15T14:46:03.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2025-07-06T19:11:31.000Z (3 months ago)
- Last Synced: 2025-07-06T20:21:34.904Z (3 months ago)
- Topics: algorithms, competitive-programming, data-structures, graphs, string-matching
- Language: C++
- Homepage:
- Size: 1.85 MB
- Stars: 159
- Watchers: 10
- Forks: 30
- Open Issues: 9
-
Metadata Files:
- Readme: README.md
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README
# Competitive Programming
A C++ code library that contains useful data structures and algorithms tailored for competitive programming contests.
#### PDF Version
[1] You can download an easy printable minified PDF version of this library from [here](docs/Momentum%20Library.pdf).
[2] You can download *Theoretical Computer Science Cheat Sheet* from [here](docs/Cheat%20Sheet.pdf).
## Content
### Data Structures
- [Sparse Table](src/data_structures/sparse_table)
- [Monotonic Queue](src/data_structures/monotonic_queue)
- [Implemented with two stacks](src/data_structures/monotonic_queue/monotonic_queue_using_stacks.cpp)
- [Implemented with double ended queue](src/data_structures/monotonic_queue/monotonic_queue.cpp)
- [Disjoint-Sets (DSU)](src/data_structures/disjoint_sets_union/)
- [Interval Map](/src/data_structures/interval_map/interval_map.h)
- Trees
- [Fenwick Tree (Binary Indexed Tree)](src/data_structures/fenwick_tree)
- [Basic Fenwick Tree](src/data_structures/fenwick_tree/fenwick_tree.cpp)
- [Fenwick Tree with Range Update](src/data_structures/fenwick_tree/fenwick_tree_range.cpp)
- [Fenwick Tree as Multiset](src/data_structures/fenwick_tree/fenwick_tree_multiset.cpp)
- [Segment Tree](src/data_structures/segment_tree)
- [Basic Segment Tree (static memory allocation)](src/data_structures/segment_tree/segment_tree_static.cpp)
- [Basic Segment Tree (dynamic memory allocation)](src/data_structures/segment_tree/segment_tree_dynamic.cpp)
- [Persistent Segment Tree](src/data_structures/segment_tree/persistent_segment_tree.cpp)
- [Segment Tree as Multiset](src/data_structures/segment_tree/segment_tree_multiset.cpp)
- [Treap](src/data_structures/treap)
- Splay Tree **(coming soon)**
- [SQRT Decomposition](src/data_structures/sqrt_decomposition)
- [Mo's Algorithm](src/data_structures/sqrt_decomposition/mo_algorithm.cpp)
### Strings
- [KMP](src/strings/KMP)
- [Z-Algorithm](src/strings/z_algorithm)
- [Trie](src/strings/trie)
- [Implemented with static memory allocation](src/strings/trie/trie_static.cpp)
- [Implemented with dynamic memory allocation](src/strings/trie/trie_dynamic.cpp)
- Suffix Array
- [Suffix Array O(n.log^2(n))](src/strings/suffix_array/suffix_array_slow.cpp)
- [Suffix Array O(n.log(n))](src/strings/suffix_array/suffix_array.cpp)
- Aho Corasick's Algorithm **(coming soon)**
### Graphs
- [Graph Traversal and Representation](src/graphs/traversal)
- [Optimized Representation](src/graphs/traversal/graph_traversal_static.cpp)
- [DFS](src/graphs/traversal/graph_traversal.cpp#L14)
- [BFS](src/graphs/traversal/graph_traversal.cpp#L25)
- [Topological Sort](src/graphs/traversal)
- [DFS](src/graphs/traversal/graph_traversal.cpp#L43)
- [BFS (Khan's Algorithm)](src/graphs/traversal/graph_traversal.cpp#L59)
- [Shortest Path](src/graphs/shortest_path)
- Single Source Shortest Path (SSSP)
- [BFS](src/graphs/shortest_path/bfs.cpp)
- [BFS on Complement Graph](src/graphs/shortest_path/bfs_complement_graph.cpp)
- [Dijkstra's Algorithm](src/graphs/shortest_path/dijkstra.cpp)
- [Bellman Ford's Algorithm](src/graphs/shortest_path/bellman_ford.cpp)
- [Optimized Bellman Ford's Algorithm](src/graphs/shortest_path/bellman_ford_optimized.cpp)
- All Pair Shortest Path (APSP)
- [Floyd Warshal's Algorithm](src/graphs/shortest_path/floyd_warshal.cpp)
- [Minimum Spanning Tree](src/graphs/minimum_spanning_tree)
- [Kruskal's Algorithm](src/graphs/minimum_spanning_tree/kruskal.cpp)
- [Prim's Algorithm](src/graphs/minimum_spanning_tree/prim.cpp)
- [Strongly Connected Components (SCC)](src/graphs/strongly_connected_components)
- [Kosaraju's Algorithm](src/graphs/strongly_connected_components/kosaraju.cpp)
- [Lowest Common Ancestor (LCA)](src/graphs/lowest_common_ancestor)
- [Implemented with parent sparse table](src/graphs/lowest_common_ancestor/LCA.cpp)
- [Implemented with Euler walk and RMQ](src/graphs/lowest_common_ancestor/LCA_Euler.cpp)
- [Max Flow](src/graphs/max_flow)
- [Edmonds-Karp's Algorithm](src/graphs/max_flow/edmonds_karp.cpp)
- [Others](src/graphs/others)
- [Tree Diameter](src/graphs/others/tree_diameter.cpp)
- [Bipartite Graph Check](src/graphs/others/bipartite_graph.cpp)
- [Graph Bridges](src/graphs/others/graph_bridges.cpp)
- [Bridge Tree](src/graphs/others/bridge_tree.cpp)
### Math
- [Basic Discrete Math & Modular Arithmetics](src/math)
- [Greatest Common Divisor (GCD)](src/math/math.cpp#L9)
- [Least Common Multiple (LCM)](src/math/math.cpp#L29)
- [Bézout's Coefficients (using extended Euclid's method)](src/math/math.cpp#L44)
- [Fast Power](src/math/math.cpp#L69)
- [Modular Inverse](src/math/math.cpp#L97)
- [Combinations (nCr)](src/math/math.cpp#L117)
- [Combinations (nCr) for Large Numbers](src/math/math.cpp#L139)
- [Pascal Triangle](src/math/math.cpp#L176)
- [Check Integer Primality](src/math/math.cpp#L196)
- [Check Integer Primality using Miller Rabin](src/math/math.cpp#L219)
- [Generate Prime Numbers (using Sieve of Eratosthenes' algorithm)](src/math/math.cpp#L290)
- [Generate Divisors (single/bulk operation)](src/math/math.cpp#L315)
- All divisors
- Prime divisors
- [Matrix Operations](src/math)
- [Matrix Class](src/math/matrix.cpp)
- [Matrix Power](src/math/matrix_minified.cpp)
### Geometry
Will be added soon...
### Search Algorithms
- [Binary Search](src/search/binary_search.cpp)
- [Ternary Search](src/search/ternary_search.cpp)
### Sorting Algorithms **(coming soon)**
- Heap Sort
- Merge Sort
- Quick Sort
- Radix Sort
### Other Algorithms
- [K-th Order Statistic](src/others/kth_order_statistic.cpp)
- [Longest Increasing Sub-sequence (LIS)](src/others/others.cpp)
- [Stress test code](src/others/stress.cpp)
- [Code definitions](src/others/others.cpp)
## Thanks
Special thanks to anyone contributed to this repository:
- By teaching me any of these topics.
- By inspiring me any code optimizations.
- By being supportive.