Data Structures and Algorithms Resources

This page is a compilation of (almost-entirely) free resources for people to use. The categories are taken from neetcode since we’re currently (as of writing) following this study plan as a community.

Recommended General Resources

• General:
  • Data Structures & Algorithm Analysis by Clifford A. Shaffer
  • UC Berkeley: CS 61B Spring 2024
    • Ben’s Notes: CS 61B
  • VisuAlgo: A collection of DSA animated visualizations.
• More advanced:
  • Algorithms for Competitive Programming (cp-algorithms.com)
  • CP1
  • CSES Competitive Programming Books List
    • Competitive Programmer’s Handbook is on there, and is free to download a full PDF copy of.
  • systemic’s blog: A mix of content, but has plenty of DSA content to check out!
  • USACO Guide
• Paid resources:
  • Grokking Algorithms by Aditya Y. Bhargava: A more beginner-oriented book covering a good selection of topics.
  • Introduction to Algorithms by Cormen, Leiserson, Rivest, and Stein

For more resources, check out More General Resources.

Arrays & Hashing

• systemic’s blog: Cyclic Sort
• systemic’s blog: Knuth–Morris–Pratt
• systemic’s blog: Min/Max Queues
• systemic’s blog: Rabin-Karp

Two Pointers

Sliding Window

Stack

• AlgoMonster: Monotonic Stack/Deque Intro
• systemic’s blog: Monotonic Stack Algorithms

Binary Search

• systemic’s blog
• ralismark’s blog

Linked List

Trees

• systemic’s blog: Binary Lifting

Tries

Heaps/Priority Queues

• sim’s notes: Binary heaps implementation with Python

Backtracking

Graphs

• systemic’s blog: Finding bridges in an offline graph
• systemic’s blog: Shortest Path Algorithms
• systemic’s blog: Strongly Connected Components
• systemic’s blog: Topological Sort

Dynamic Programming

• sim’s notes: Currently a work-in-progress, but it should still be useful!
• systemic’s blog

Greedy Algorithms

• systemic’s blog: Greedy Scheduling Heuristics

Intervals

Math and Geometry

Bit Manipulation

More Topics

• systemic’s blog: Fenwick Trees
• systemic’s blog: Segment Trees
• systemic’s blog: Sparse Tables

More General Resources

• Booksite for Algorithms, 4th Edition
• Codeforces Blogs
  • vaibhav1997’s list
  • There’s many more. Browse through the website!
• DeriveIt: Has some leetcode solutions with commentary.
• Topcoder Tutorials
• UC Berkley:
  • CS 61B Data Structures, Spring 2023
  • Hug61B Spring 2019 Edition
• UNSW
  • All the COMP2521 code is in C though, so it might not be as useful if you’re not comfortable with C.
  • COMP2521 21T2 Lecture Recordings
  • COMP2521 Notes by Luka Kerr
  • COMP4128 23T3 Resource List: Resources for competitive programming!
• YouTube
  • WilliamFiset