![]() The official language of the contest is English, although we try to offer translations of the problem set into several other languages for convenience of our international competitors. If you receive an in-contest promotion, you will be able to start working on the next contest any time within the larger contest window, and with a full timer that is, time you spent on the earlier contest does not count against the time you will have to solve the next contest. If you achieve a particularly high score (often required to be a perfect score) during a contest, you may qualify for an “in contest” promotion otherwise, promotions will be granted after a contest ends to all participants with scores above the promotion threshold for that contest. The judges reserve the right to add or remove test cases after the end of the contest, so it is still worthwhile to test your program even if it passes all of the cases during the contest. The first test case is typically the same as the sample case described in the problem statement, and you need to solve it correctly before you are given feedback on the remaining cases (which are not revealed during the contest, even though you receive feedback on whether you solved them or not). If your program fails to compile, you will be shown the error messages from the compiler. Incorrect submissions are further differentiated by the type of problem: X (incorrect answer), T (time limit exceeded), ! (run-time error or memory limit exceeded), E (empty output file), or M (missing output file). When you submit a program, it will be run against a number of juding test cases and for each one, you will receive feedback, shown in a colored box: green for correct, and red for incorrect. When you start the contest, your personal timer starts counting down, and you will be able to view the contest problems and submit solutions via this website. You can take the contest during any block of time you want, as long as you start during the larger contest window. The contest is typically 3.4 contiguous hours in length. Problems are intended to be challenging it is rarely the case that a large number of competitors receive near-perfect scores! All problem statements are intended to be straightforward, with no intentional “hidden tricks” (however, note that legal but complex datasets are fair game for testing). Your score for each problem depends on the number of input cases your program can solve within the time limit (for most contests, 2 seconds per input case for C, C++, and Pascal, and 4 seconds per input case for Java and Python, although the each contest or problem may use slightly different limits). ![]() Problems are algorithmic in nature, so clever algorithms and/or data structures might be necessary to solve all test cases correctly and within the time limits. There is never any fee for participation.Įach contest has typically 3.4 problems to which you will submit solution programs in C, C++, Pascal, Java, or Python. Only pre-college students in the USA are eligible for selection as finalists to attend the USACO training camp and to contend for membership on the USA IOI team. Official results will generally be reported only for high-school (pre-college) students visitors/observers/”for fun” entries will be scored and reported separately. Please use the same login ID for all contests so we can keep track of everyone’s progress. All new participants start out in the bronze division, and those who score particularly well in their current division will be promoted to the next division for future contests (promotion criteria varies per contest, since every contest is different). Contest Instructions and Rules Eligibility and ParticipationĪll are welcome to participate in USACO contests and training.
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