Lectures

Students can attend lecture in person on campus (5:40–7:40 p.m. Eastern time in One Brattle Square, room 204), participate live online at the time the class meets via web conference, or watch a recorded video on demand.

• To access the live lecture meetings, go to the course’s site on Canvas and click on the Zoom link in the left-hand navigation bar. This will take you to a tool called Gather. Under Course Events, find the event labeled Class: HELIX Classroom and click its Join button.

• The lectures will be recorded and made available within 24 hours. Use the Class Recordings link on Canvas to access them.

Full coursepack
Optional readings

Introduction

notes, ArrayBag.java

Recursion and backtracking

notes, code, solutions to removeVowels practice exercise

Sorting and algorithm analysis I

notes, code

Sorting and algorithm analysis II

notes, code

Linked lists

notes, StringNode.java

two simpler versions of StringNode that can be traced using Java Tutor:

• one tracing a call to toUpperCase
• one tracing calls to copy and deleteChar

Lists, stacks and queues

notes, code, completed slides on list efficiency

Binary trees and Huffman encoding

notes, code, solutions to extra traversal problems

Search trees

notes, code

Heaps and priority queues

notes, code

Hash tables

notes, code

Graphs

notes, code

Last updated on October 29, 2025.