Вкратце правила выглядят так:

***************************** REGULAR RULES *******************************
THREE DIVISIONS FOR THIS CONTEST, TWO BY INVITATION
Anyone may enter the BRONZE division; GOLD and SILVER are by
invitation only. Visit http://contest.usaco.org/showdiv to
learn any ID's division.
Of course, any one competitor can enter only one division.
CONTEST LENGTH IS THREE HOURS FOR EVERYONE
All contestants should devote THREE consecutive hours to the
contest.

DON'T CHEAT

Do not use another login id to read the problems and thus
cheat. Do not collaborate with others. You must label any
code you do not write from scratch during the contest. IF YOU
ARE CAUGHT CHEATING, YOU ARE BANNED FOR LIFE FROM ALL USACO
ACTIVITIES. DON'T CHEAT. THERE ARE NO SECOND CHANCES.

Do not use use two login ids in order to participate in more
than one division.

USING CODE FROM OTHER SOURCES

If you use code from a book or other source during this contest,
insert a comment in the code telling the source or you will
be disqualified and banned.

****************** SPECIFIC INFORMATION FOR THIS CONTEST ******************

DATES: 04h00 GMT Friday 11 Mar - 13h00 GMT Tuesday 15 Mar
21:00 MST Thursday 10 Mar - 07:00 MDT Tuesday 15 Mar

 TIMELIMIT: Three consecutive hours to solve all problems.

SOLUTIONSTO: http://ace.delos.com/contestgate

COMPILELIMIT: Your program must compile in 30 seconds or less

RUNTIMELIMIT: 1.000 second max per test case (unless otherwise
stated) NOTE: Java users get 2.0x the normal runtime
limit, since Java code runs more slowly. The judges
reserve the right to change this constant at any
time for any reason. Java times are scaled and
reported as 0 .. 1.0 seconds, though. CPU times are
usually scaled to match those from an older, slower
processor that is the 'standard' against which our
tasks are timed.

COMPILERS: gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) 
Free Pascal Compiler version 2.4.0-2 [2010/03/06] for i386
Sun JAVA 1.6.0

GRADING_OS: Linux delos.DELOS.COM 2.6.32-23-generic #37-Ubuntu
SMP Fri Jun 11 07:54:58 UTC 2010 i686 GNU/Linux

PROCTORING: Not required for any division.

ASSISTANCE: Books, websites, old files, and any other non-human
assistance is OK. Add an explanatory comment to any
code that is copied from a book or from an old file
(failure to do so will lead to disqualification).
Do not search for exact solutions on the web or use
solutions posted at the USACO or similar sites.

DIVISIONS: Three divisions: GOLD, SILVER, and BRONZE. GOLD and
SILVER division entry is by invitation only.

ANALYSIS MODE: 'Analysis mode' will be available when the contest
ends. You can read all the various tasks and re-test
your programs to see how they would do with various
changes. You can also see the other division problems
and solve them.

************************* HOW TO USE WEB SUBMISSION ********************

Add identification lines like these to the beginning of your program's
source file (omit the explanations shown on the right in parentheses):

For C, C++, JAVA:

/*
PROG: cowfun (whatever the problem name is)
LANG: C++ (Choose one: C, C++, JAVA)
ID: your_id_here (Use your own login ID)
*/

Don't use //-style comments for these headers; they won't work.

For Pascal:

{
PROG: cowfun (whatever the problem name is)
LANG: PASCAL
ID: your_id_here (Use your own login ID)
}

Then, type the filename into the obvious browser form and click
"Send It In". Your results will be displayed shortly thereafter.

You can submit solutions to a simple problem before starting the
contest timer in order to ensure that all mechanisms work. The
program name is `test' and the files are `test.in' and `test.out'.
The input file contains two integers on a single line. Sum them
and print the sum to a single line in the file named `test.out'.