General Rules

• Only teams with only middle or high school students (rising 6th - senior) are eligible for prizes, however everyone (college students, workers) is welcome to compete.
• Each team may have up to 4 people. Team members may not receive any help from anyone outside of their team.
• Teams must submit at least once to be eligible for raffle prizes.
• Teams may use multiple computers and submit answers in multiple languages.
• Pre-written code and online reference guides are allowed (in other words, internet is allowed so long as you’re not asking people how to solve our problem).
• We reserve the right to disqualify participants who intentionally participate in divisions with problem difficulties that are too low for the skill level of the participant. Teams with a member who satisfy a condition of the advanced division cannot participate in the Novice division. We do not tolerate those who attempt to undermine the fairness of the competition.
• There are two divisions: Novice and Advanced. We expect each division will be interesting for participants of the following skill levels:
  • The novice division is intended for students who know programming but have not started or have just started competitive programming:
    • Taking or have taken APCS
    • USACO Bronze-Silver
    • 0 - 1599 Codeforces max rating
  • The advanced division is intended for anyone who is confident in their competitive programming ability:
    • USACO Gold and above
    • 1600+ Codeforces max rating
• Contest page: https://spring25.teamscode.org
• Join our discord server here: https://go.teamscode.org/discord for important contest announcements or if you have any questions.
• Try more problems from the last contest:
  • CodeForces Gym
  • You will need to make a codeforces account: https://codeforces.com/register

Problem Format

• Description: an overview of the problem.
• Input Format: specifies how the input will be formatted, including constraints on the size of parameters. (constraints may be stated in the Description).
• Output Format: specifies how the output should be formatted - if you don’t follow this format exactly, your answer will most likely be marked as incorrect.
• Sample Input: provides a sample input to help you test your code.
• Sample Output: provides the expected output to the sample input.
• Sample Explanation: provides an explanation of how the sample output was obtained from the sample input.

Submitting Solutions

• Allowed Languages: C++, C, Java, Python 2, Python 3
• Solutions will be submitted through the contest page listed above. The code for each problem should be copy-pasted into the box that appears after clicking “Submit Code”.
• For Java submissions, the class name of your main function must be Main.
• The file size containing your code must not exceed 50 KB.
• Default Constraints
  • Note that constraints may vary depending on the problem.
  • Time Limit: Your program must run in under 2,000 ms (2 seconds) for C and C++, under 4,000 ms (4 seconds) for Java, and under 8,000 ms (8 seconds) for Python. Time limits for each language may be different if specified in a problem.
  • Memory Limit: The program's memory must not exceed 256 MB
• Use Standard Input in your code. This means that test cases are directly typed into the console. Here’s an example for each of the allowed languages:
  Java: Scanner(System.in) C++: cin>> Python: input() C: scanf()
• Use Standard Output in your code. This means that the output directly prints to the console. Here’s what standard output looks like for each of the languages:
  Java: System.out.println() C++: cout<< Python: print() C: printf()

Scoring

Problem Difficulty

• There are ~10 total problems in ascending order of difficulty.

Problem Points

• All problems are each worth 100 points. Each problem has some number of tests (usually 10 or 20). Sample test is worth 0 point. If you solve X non-sample tests correctly for a problem with Y non-sample tests, you get (X/Y * 100) points.
• Note that each test may have multiple test cases where each test case must be solved correctly to get points for the test.
• Output must match exactly with expected output to receive points for the test case - there is no partial credit.

Problem Tests

• The first test is always the sample given in the problem.
• Some problems will have explicitly stated subtasks. For example, a problem with 10 tests may have tests 1-5 with N<=10 and tests 6-10 with N<=100.

Ties

• Ties will be broken by the timestamp on the last submission that increases your total score.