The USACO's flagship tournament, THE U S OPEN, will be held on two sets of

FOR USA STUDENTS: All entries will be proctored on April 21 with a 'make up' day of  April 22 at a time of your choice. Note that some USA students live in foreign countries and attend 'American Schools' and the like. Any USA citizen or current resident who wishes to be considered for USACO training camp must have a proctor.

FOR non-USA STUDENTS and those USA students who do not wish to attend USACO training camp: The tournament will open early on Thursday, April 23 and run through Sunday, April 26.

This is a FIVE HOUR tournament.  USA entries will require a proctor.


Each USA student who enters the U S Open on April 21,  will
require a proctor -- an adult who will vouch that all rules were followed
during the five hours of the contest.  This adult might be: a teacher, a
parent, an older sibling, a neighbor, a librarian, or anyone else who can
convince me that they are trustworthy.

should have the Nickname "proctor".  They should also send email to me at with 35 words (or so) about themselves.  I will then
validate their "proctor" status in the database.  I will, potentially randomly,
ask some proctors to phone me toll-free for a 60 second voice conversation.

STUDENTS should make sure their proctor has registered.  Students will not
be able to start the contest without a valid proctor as I am going to send
the proctors a special "proctor validation" word that each student must
submit in order to begin the contest.  Registration on the day of the
contest will be harried and difficult -- please do not wait until Thursday
to acquire a proctor or you might miss out altogether.


I am anticipating that this will be the biggest contest ever.  The coaches
are working hard on the problems (two divisions!) and look forward to this
event to crown the U S Open programming champion in addition to providing
final input for choosing attendees at this year's USACO Training Camp in

Contest Director

Rob Kolstad