Algorithms

My notes on classical algorithms and data structures — the kind of material that comes up in systems design, interview prep, and reading about database internals. Kept as short term notes, not tutorials.

Complexity

• Big-O notation — how to talk about growth.

Linear data structures

• Arrays, linked lists
• Stacks, queues
• Hash maps, sets

Trees and graphs

• Trees, heaps, tries
• Graphs, graph algorithms

Algorithmic techniques

• Binary search
• Two pointers, sliding window
• Recursion, dynamic programming
• Greedy algorithms
• Sorting algorithms