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How to ask for help on a problem
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Here are some general guidelines for how to effectively ask for help on the Forum: Basic Requirements Include a link to the problem. For problems that that can be found within the guide, just include the internal Gui…

1 18660 December 30, 2020
Welcome to the USACO Forum!
1 7523 November 19, 2020
probelms before 2015
General Questions
1 30 June 20, 2026
Wrong constants in internal solution
Resources & Problemsets
1 61 June 18, 2026
guidance for a newbie to cp
Resources & Problemsets
0 82 June 12, 2026
Two knights problem
Problems and Contests
1 678 June 8, 2026
CSES: Corner Subgrid Check
Problems and Contests
1 134 June 7, 2026
Possibly wrong internal solution
Resources & Problemsets
1 137 June 5, 2026
Can someone explain this please?
Debugging Help
3 193 May 28, 2026
How to practice and solve problems more effectively
General Questions
0 222 May 18, 2026
Feeling stuck as a beginner
General Questions
1 330 May 11, 2026
Looking for people to join contest for acpc contest
Off Topic
0 191 May 6, 2026
Troubles with geometry problem "16"
Debugging Help
0 261 May 1, 2026
Can i use helper functions like printArr
General Questions
2 375 April 29, 2026
Silver 2020 Jan Loan Repayment with Binomial Theorem
Problems and Contests
4 1928 April 24, 2026
Is competitive math useful in USACO
General Questions
5 478 April 22, 2026
What's the main differences between TWO POINTERS and SLIDING WINDOW?
General Questions
1 470 April 18, 2026
How to solve APIO 2019 - street lamps using 2DRQ
Problems and Contests
1 954 April 17, 2026
Is the usaco guide problems page broken ?
Site Feedback
1 357 April 2, 2026
About the listed question
Problems and Contests
2 359 March 31, 2026
Does the problem "Team Building" (USACO 2016 December Platinum Problem 2) not reduce to finding all valid parenthetical expressions of length 2K given a string of ( and )?
0 537 March 27, 2026
Stuck in a Rut – issue with mathematical (pairwise) approach
Debugging Help
0 472 March 25, 2026
What should I do if I can't solve anything in module
General Questions
0 382 March 19, 2026
Issue with USACO guide's solution for lasers and mirrors
Problems and Contests
2 424 March 17, 2026
About Resources in Usaco Guide
General Questions
1 392 March 11, 2026
Result of USACO contest not showing
General Questions
2 470 March 9, 2026
Need help understand the full solution for problem #3 Purchasing Milk
Problems and Contests
3 470 March 5, 2026
CSES: All Letter Subgrid Count I
Problems and Contests
9 1264 March 3, 2026
DNC DP + Mo's at the same time? [Advanced]
Problems and Contests
2 647 March 3, 2026
Angry Cows - Gold January 2016 Problem 1
5 1318 February 23, 2026