The JOI (Japanese Olympiad of Informatics) Open Contest 2014 problems have been added to the DMOJ.

https://dmoj.ca/problems/?category=23

Many of them use signature grading, unlike most of the DMOJ problemset.

JOI '14 problem 4, Migration, was an output-only task that was judged against other contestant submissions. Since the DMOJ doesn't have the required infrastructure (and it's not worth adding it for one problem), Migration has not been added.

Like charts? Statistics? Charts and statistics? We do too. That's why we've compiled relative statistics regarding submissions in _{actually used} languages on the DMOJ.

Update: The latest statistics are available at https://dmoj.ca/stats/language/

Are you interested in how other people did on the CCC, and are curious about your chances of making it into the CCO? Here's an unofficial poll where you can enter your score and check out others' scores. There's no penalty or anything if you lie, but there's really no point in doing so either, as the poll is anonymous.

"It would be really easy to put fake votes and make everyone panic but we're trusting people not to do that. Only vote if you wrote the Senior!"

(poll courtesy of nullptr)

Here is the editorial (with solutions) for problems 1-4 and problem 6 of UTS Open '15 (final rankings here). jeffreyxiao is bogged down with Spanish at the moment and will supply the editorial and solution for problem 5 as soon as he is able.

Thank you for participating in the UTS Open - we hope to see you again next year!

Update: Kirito wrote an editorial for problem 5.

The solutions to the Mock CCC 2015 can be found here:

Junior: https://accounts.google.com/ServiceLogin?service=wise&passive=1209600&continue=https://drive.google.com/file/d/0Bz8sftGywZGxOHBmRXhINjY5U3M/edit&followup=https://drive.google.com/file/d/0Bz8sftGywZGxOHBmRXhINjY5U3M/edit

Senior: https://accounts.google.com/ServiceLogin?service=wise&passive=1209600&continue=https://drive.google.com/file/d/0Bz8sftGywZGxSzZTMzE2NEhKb2s/edit&followup=https://drive.google.com/file/d/0Bz8sftGywZGxSzZTMzE2NEhKb2s/edit

The PDF generation feature for the DMOJ has been updated to use wkhtmltopdf through a virtual X buffer.

Try it out! https://dmoj.ca/problem/ioi13p4/pdf

Formatting for complex problems should be flawless now.

We've added an API for accessing most public data used by the DMOJ.

You can read the documentation here.

Anything you'd like added to the API, or think we've missed? Please let us know in the comments!

Update 2015-02-15: the contest has been extended to Monday, February 16th, so that those who had plans for Valentine's Day get a chance to write the contest.

Things go awry this Valentine's day when the Ice King kidnaps everyone in the land of Ooo for a wooing session! Try not to get your socks and hat and limbs blown off as you read of the recent events in the Ice Kingdom!

The Valentine's Day 2015 contest will consist of three problems of medium-level difficulty. The contest will run on February the 14th from 12:00AM to 11:59PM EST. Within this window, you will have 3 hours to write the contest.

The problem writer is bobhob314.

Visit the contest page for more details.