The following categories related problems' solutions are in the repository

Advanced Search Techniques

Binary Search/ Bisection
Ternary Search

Data Structures

Basic Data Structures
Binary Indexed Tree
Binary Search Tree
Hashing
Orthogonal Range Search
Range Minimum Query/Lowest Common Ancestor
Segment Tree/Interval Tree
Trie Tree

Graph Theory

2-SAT
Articulation/Bridge/Biconnected Component
Bellman Ford
Breadth First Search/Depth First Search
Cycles/Topological Sorting/Strongly Connected Component
Dijkstra/Floyd Warshall
Directed Minimum Spanning Tree
Euler Trail/Circuit
Heavy-Light Decomposition
Minimum Spanning Tree
Stable Marriage Problem

Divide and conquer

Dynamic Programming
Discrete Logarithm
Greedy