Announcements (Search)

Post general comments here

by Alex on Apr 28, 2015 - 11:48:46 pm UTC
  • (2/0)
This is the place to post general comments, such as pressing bugs or broader questions.

Goodbye USACO Problems

by Alex on Mar 12, 2015 - 1:14:36 am UTC
  • (3/0)
Due to a recent request from Dr. Brian Dean, the other administrators and I have decided to remove our archive of USACO problems. We do this out of courtesy for Dr. Dean and his associates, as well our appreciation for the great enrichment opportunity that USACO brings to high schools everywhere.

If you would like to further practice on USACO problems, please visit the official USACO website and practice the problems there. For one week (until March 18th), the "Farewell USACO" contest will be open in the contest area for you to back up your existing programs. We hope to bring you more exciting problems in the future.

Best wishes!

CCC 2015 Problems Added

by Alex on Feb 21, 2015 - 5:37:08 pm UTC
  • (2/0)
Access them here!

Junior Problems
J1: Special Day
J2: Happy or Sad
J3: Rövarspråket
J4: Wait Time
J5: Pi-Day

Senior Problems:
S1: Zero That Out
S2: Jerseys
S3: Gates
S4: Convex Hull
S5: Greedy for Pies

Mock CCC 2015 is Here!

by Alex on Feb 13, 2015 - 4:26:36 am UTC
  • (4/0)
The 2015 Canadian Computing Competition is around the corner. User FatalEagle and I have prepared another mock CCC for you to test your might.

  • When: The contest window will be between Friday, Feb 13 at noon (EST) and Monday, Feb 16 at midnight (EST). Any time during this period, you may enter the contest and your personalized timer will count down from 3 hours.
  • Where: Right here on the PEG Judge! Head over to the contests section of the site and click "Enter" when the time period begins.
  • Format: 5 problems for junior and 5 problems for senior, just like the real CCC. Each problem will be worth 15 points, and each contest is out of 5*15 = 75 points. There will be full-feedback for your submissions, and submissions times are irrelevant.

The exact same contests are also being held on the Don Mills Online Judge ( This is merely an opportunity to practice and improve, so use these system at your own discretion. Analyses will be provided after the contest period. Good luck!

Problem search has been improved

by Alex on Dec 05, 2014 - 4:20:06 am UTC
  • (6/1)
Searching problems should be much more effective now.

UI updates (Shift + F5 to Refresh!)

by Alex on Nov 09, 2014 - 2:33:53 am UTC
  • (1/1)
Zebra stripes have been added to the problems page, along with some other UI improvements. Please press Shift+F5 to completely refresh the site in your browser (Option+Shift+R on a Mac).

PEG Judge user interface

by bbi5291 on Oct 10, 2014 - 4:41:05 am UTC
  • (3/0)
Does anyone have any suggestions about how to improve the user interface? It hasn't received much attention since I've mostly been focusing on adding new features and fixing bugs.

Ruby upgraded to version 2.1.2

by bbi5291 on Sep 10, 2014 - 9:48:12 pm UTC
  • (3/1)
This replaces the old version, 1.8.7.

Password reset should now be working again

by bbi5291 on Aug 23, 2014 - 9:56:03 pm UTC
  • (1/0)
Sorry for the delay. Mail servers are hard to set up.

Weird timing errors should be fixed

by bbi5291 on Aug 20, 2014 - 4:38:55 am UTC
  • (1/0)
CPU time usage is now reported more accurately, so you won't see 4.5 s reported if your program TLEs on a 5 second limit. (Actually the measured time may be something like 4.999 s, in which case it gets rounded up to 5.000. But the point is that time is reported more accurately now.)

Also, if the time limit is 0.5 s, and your program uses 0.6 s, this used to not be considered a TLE, but this was a bug, which is now fixed.