CSI 4144: Competitive Learning, Spring 2017


This course is a topics course in problem solving and algorithms. It is modeled on the collaborative and competitive environments at the ACM International Collegiate Programming Contest. Each week we will discuss a topic, and the assignments will be programming-based problems related to that topic.

Practical information

Lectures are Tuesdays from 14:30 to 16:20 in Cashion C201.

My office location and office hours are listed on my home page. I am glad to talk to students during and outside of office hours. If you can't come to my office hour, please make an appointment for another time, or just stop by.

You will submit your solutions to Baylor's Kattis Judge. You may need to create an account, and will then register for the course.


Here is a schedule of the material we will cover. Please visit Kattis to see the assignments for each week.


  1. Introduction to Problem Solving.
  2. Elementary Data Structures — The C++ Standard Template Library or Java Collections, including sequence containers, iterators and basic template algorithms. Sorted associative set and map data structures and their implementations in C++ STL or Java Collections.
    Problem ideas due for 2nd/3rd semester students.
  3. Strings and string algorithms, searching, sorting.
  4. Sorting and applications to uniqueness testing, deleting duplicates, selection, efficient searching, and set intersection/union.
  5. First Local Contest.
  6. Arithmetic and algebra, big number implementation, prime factorization.
    Begin work in teams.
  7. Arithmetic and algebra, number theory, counting problems, modular arithmetic.
  8. Simulation problems.
  9. No meeting (Spring break); no problems assigned
  10. Second Local Contest.
    Complete drafts of problem packages due for 2nd/3rd semester students.
  11. Elementary Search Topics, recursive depth-first search, combination and permutation generation, state space traversal.
  12. Intermediate Search Topics, search pruning and ordering.
  13. No meeting (Diadeloso) Disjoint set data structure, path compression algorithm, and applications.
  14. Representing, counting, and computing on grid-oriented data; rectangular, hexagonal, and triangular grids.
  15. No meeting (catch up on problem solving, finish writing problems, etc.)
  16. Final Local Contest.
    Final problem packages due for 2nd/3rd semester students.

Textbooks & resources

The textbook for this course is Competitive Programming by Steven Halim and Felix Halim (Edition 1 is free online, editions 2 and 3 are inexpensive). (If that link is not working, try this for edition 1: cp1.pdf.)

The following books may also be useful:

Other online programming contest software:

Other online resources:

Course handouts


Grades will be assigned based on the following breakdown:

Final letter grades will be assigned at the discretion of the instructor, but here is a minimum guideline for letter grades:
A: 90-100, B+: 88-89, B: 80-87, C+: 78-79, C: 70-77, D: 60-69, F: 0-59

Solving problems

Each problem completed within 1 week of it being assigned earns 2 points. Each problem not completed within a week but completed by the end of the semester earns 1 point. Completing a program means passing the (hidden) tests on the judge.

For weeks designated as "contests", the problems will not be publicly posted to the web. You should choose a 3 hour window during which you plan to work on the problems. Send your professor an email about 24 hours in advance of this time, and he will send you the problems via email. Then work on the problems during your chosen time frame.

Writing problems

Students taking the course for the second (third) semester must develop one (two) problems of their own. Use the Kattis problem package and fill in the relevant parts. In particular, your writeup should have:

The reason we use Kattis problem package format is due to the set of tools that are available for verifying problem integrity. You should get and install them from github on the Kattis problemtools project page. (They are easiest to install on Ubuntu.) As the problemtools package uses a Git submodule, to get the full source you need to use the following command to get all the sources you'll need:

git clone --recursive git@github.com:Kattis/problemtools.git
After installing it, use this software to verify your problem package before submitting it to me. This means running "verifyproblem.py" to verify the entire problem package. You can also use "problem2pdf.py" to see how your problem writeup looks when rendered in PDF.

There are multiple deadlines for problem writeups, which are listed on the schedule above:

  1. The first deadline is a 1-2 paragraph description of the problem idea(s), including the motivation, type of problem (search, shortest path, dynamic programming, etc.), and the basic story outline for the problem.
  2. The second deadline ("Complete draft") means all parts of the problem package(s) should be written -- solution, writeup, input verifier, problem data, etc. The package should verify with Kattis problemtools "verifyproblem". I will evaluate these and send feedback for the final version.
  3. The deliverable of the final deadline is the same as that of the complete draft, except it should be highly polished and in final form. Even with a complete draft that is in good shape, getting a well-crafted problem can be a lot of work, so don't put off working on this.

Here are some additional thoughts and guidelines on how to write programming contest problems.


Academic honesty

I take academic honesty very seriously. Many studies, including one by Sheilah Maramark and Mindi Barth Maline have suggested that "some students cheat because of ignorance, uncertainty, or confusion regarding what behaviors constitute dishonesty" (Maramark and Maline, Issues in Education: Academic Dishonesty Among College Students, U.S. Department of Education, Office of Research, August 1993, page 5). In an effort to reduce misunderstandings, here is a minimal list of activities that will be considered cheating in this class:

Title IX Office

Baylor University does not discriminate on the basis of sex or gender in any of its education or employment programs and activities, and it does not tolerate discrimination or harassment on the basis of sex or gender. This policy prohibits sexual and gender-based harassment, sexual assault, sexual exploitation, stalking, intimate partner violence, and retaliation (collectively referred to as prohibited conduct). For more information on how to report, or to learn more about our policy and process, please visit www.baylor.edu/titleix. You may also contact the Title IX office directly by phone, (254) 710-8454, or email, TitleIX_Coordinator@baylor.edu.

Copyright © 2017 Greg Hamerly, with some content taken from a syllabus by Jeff Donahoo.
Computer Science Department
Baylor University

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