COSCON 2024 Problems

Before continuing, please find your Team ID here.

Welcome! There are 13 problems worth a total of 220 points. Each problem will require either submission of your solution source code to Codeforces, or submission of the files/text comprising your solution to a Google Form. If you have any questions about any problems or the competition in general, please direct them to the appropriate channel in the COSCON 2024 Discord server.

Important Information for Codeforces Problems

Each team should submit to problems under ONE CODEFORCES ACCOUNT.
Problems marked [Codeforces] can be found at this link. In particular, follow these instructions:
  1. Create a Codeforces account (if you don't have one already)
  2. Fill out this form (so we can collect your handles)
  3. Join the group using the link above (see panel on right)
  4. Enter the COSCON Fall 2024 contest.
  5. Submit your solution to the appropriate problem (see navbar).
Codeforces problem will require you to take input from standard input. If you are not familiar with this, here is an example of how to read input in Java.
If you don't have an environment to run Java/Python/etc. on your device, you can try using an online compiler such as Programiz or JDoodle.
If you need more help with this, feel free to come see us in office hours (Friend 108).

Problem 1: Degree Progress [5 points]

Tags: Programming

Problem Statement Codeforces Submission

Problem 2: Late Meal [6 points]

Tags: Programming

Problem Statement Codeforces Submission

Problem 3: Unreliable TigerTransit [10 points]

Tags: Programming

Problem Statement Codeforces Submission

Problem 4: Dean's Date Ultimate Frisbee [20 points]

Tags: Theory Programming

Problem Statement Part 1 Submission Part 2 Submission Bonus Submission

Problem 5: Crossword [20 points]

Tags: Programming

Problem Statement Word List Submission

Problem 6: Sequential Consistency [15 points]

Tags: Systems

Problem Statement File Submission

Problem 7: Course Recommendations [25 points]

Tags: Machine Learning

Problem Statement File Submission

Problem 8: Invisible Devan [25 points]

Tags: Theory

Problem Statement File Submission

Problem 9: The Last Invention [15 points]

Tags: Programming

Problem Statement Codeforces Submission

Problem 10: Gadget Ratchet [20 points]

Tags: Systems Capture The Flag

Problem Statement chal0.c chal0 chal1 Submission

Problem 11: Circuit Breaker [20 points]

Tags: Capture The Flag
Note: For parts 1 and 2, once you get the flag, submit the form linked on the corresponding page.
Hint: Read the Appendix (also you can use Google)

Problem Statement Part 0 Submission Part 1 Submission Part 2 Submission

Problem A: Intro to Digital Investigation [15 points]

Tags: Capture The Flag
Hint: For task 3, download the image

Problem Statement Task 3 Picture Submission

Problem B: Castle Invasion [24 points]

Tags: Game Theory

Problem Statement Strategy Submission