Platform Release Notes

• Teacher role
  • new Teacher role is now available
  • Algotester offers free access to the Contest platform for Ukrainian schools and universities
  • upon a Teacher request, a dedicated Event page will be created for the corresponding school
  • a Teacher can create and manage contests within their school page
  • the Contest guide Article is available at contest-guide.algotester.com
• Other fixes and adjustments
  • adjusted Contest management page texts
  • brief and extended forms for Contest as well as Contest Problem
  • upon successful Contest registration, a user is redirected to the corresponding Event page

• Platform
  • the core has been upgraded to .NET Core 8.0
  • the host operating system has been upgraded to Debian 12
  • the judge module uses Control Group v2
  • the College button is back
• New compilers
  • C (gcc version 14)
  • C++ version 23
  • Java version 23
• Other fixes and adjustments
  • default Time Limit and Memory Limit values are used when a new Problem is created
  • Output Limit property has been removed from Problem management pages
  • fixed Problem source update for Compilers with no text editor support

• New compilers
  • C++ version 20
  • Java version 19
  • Free Pascal version 3.2.2
• Other fixes and adjustments
  • solved system message localization issues
  • fixed the Back button link to the corresponding event on the Contest page
  • fixed penalty calculations in interactive scoreboards
  • Contest manager scoreboards with restricted access
  • processing of invalid problem Scorer output
  • code editor search support
  • improved Problem status update on source changes

Мої зміни: - виправлений підрахунок штрафного часу в інтреактивній таблиці - розпорядники змагання знову можуть бачити таблицю змагання якщо вона не доступна учасникам змагання

• New compilers
  • C++ version 20
  • Java version 19
  • Free pascal version 3.2.2
• Other fixes and adjustments
  • solved system message localization issues
  • fixed Back button link to the corresponding event on Contest page
  • fixed penalty calculations in interactive scoreboards
  • Contest manager scoreboards with restricted access
  • processing of invalid problem Scorer output
  • enabled browser search in HTML editors
  • improved Problem status update on source changes

• Platform
  • the core has been upgraded to .NET Core 6.0
  • Donate button has been added to the top navigation bar
  • the Donation page allows users to support Algotester via the Liqpay service
• User account managenent
  • on the profile management page, it is possible to request personal information Update or account Deletion
  • such requests will be processed by Algotester managers
  • if any additional information is needed, the user will be contacted via e-mail
  • an account's primary e-mail can now be changed
  • deleted user account references in a scoreboard or submission list will be displayed as plain text which corresponds to the user account name before the deletion
• Notifications
  • submission evaluation progress of problem Solution
  • problem build progress on a Problem management page
  • plagiarism check progress on a Contest management page
• Other fixes and adjustments
  • improved e-mail subject and message sent to administrators on user requests
  • improvements of the Plagiarism check algorithm
  • clear plagiarism data button on a Contest management page

• Problem tags
  • Tags are now available in the problem Archive
  • there are two types of tags: difficulty (blue) and topic (gray)
  • clicking on a tag triggers the corresponding problem archive filter
  • tags can be hidden on the problem archive page
• Problem tests
  • Statements-only tests now have the corresponding description on a Problem management page
  • the Generator test group now allows only a non-negative number of cases, at most 747
• Help articles
  • the Ukrainian version of user help and problem-setter guide articles have been updated
  • both articles are now displayed in the universal HTML/PDF mode
• Other fixes and adjustments
  • image display issues in HTML articles
  • duplicate form submission on inquiry and user profile pages
  • Algotester landing page is now available at hello.algotester.com

• Notifications
  • new notification subsystem based on SignalR
  • contest clarification updates will trigger corresponding user notifications
• Breadcrumb navigation
  • contest internal name is replaced with the proper statement name
  • for event contests, its event link will be displayed instead of the tournament
• Problem sources
  • for randomization, a hash string can be appended to generator arguments
  • updates and extensions to shared Algotester C++ libraries
  • fixed compiler library filtering
• Other fixes and adjustments
  • users can send personal information update requests to the platform managers
  • pending solutions are not shown as accepted
  • improved broadcast email batching
  • PDF articles can be displayed in HTML mode in a way similar to problem statements
  • general contest scoreboard improvements
  • Bootstrap table library upgrade

• Contest
  • number of unofficial participants in the scoreboard
  • the unofficial participant checkbox is hidden if the scoreboard contains no such participant
  • contest managers can override the default 20 minutes penalty for ICPC problems
  • the last improvement penalty can be calculated as a sum or a maximum over contest problems
• Problem source libraries
  • a new problem source type Library
  • there are local (related to a specific problem) and global libraries
  • a problem source that is not a library can include any local or global libraries having the same compiler
• Other fixes and adjustments
  • Cloudflare turnstile support
  • separate contest problem scoreboard issues
  • first successful solutions highlighted in General contests
  • a problem manual Test marked as Statements only will not be used during judge testing
  • not available text for PDF articles
  • byte order mark display issue for solution source codes
  • a new inquiry or contest clarification will be sent as an email to the corresponding managers

• Judge
  • new PyPy compiler
• Contest scoreboard
  • summary row at the bottom with total and successful attempt counts for each problem
  • for ICPC contests, the first successful solution for each problem is highlighted with green
  • table header contains hyperlinks to the contest problems as well as hints with problem names
  • a row with the current user or their team is highlighted with gray
  • contestant group filters
  • hide/show unofficial participants
  • attempt counts before and after the scoreboard freeze are displayed separately​

• Compilers
  • Python 3 syntax check at the compilation stage
• Problems
  • Tags are now available on the Archive management page
  • any Archive problem can be added to Contest via the management page
• Plagiarism
  • Contest managers can check plagiarism for problem solutions
  • submissions are grouped by programming language and then checked against each other
  • plagiarism record is added for every pair of solutions with different authors and a similarity score of at least 50%
• Other fixes and adjustments
  • improved Tag UI in the Archive problem list
  • fixed broken Archive problem links in editorials
  • monitoring bot has been launched, which periodically checks if the Algotester website is available

• Tags
  • problem taggings
  • tag categories
  • short and long tag names
  • public category tags are displayed in the problem Archive
• Problems
  • new Pending Changes problem status
  • the status is shown on the management page
  • the status is set to Pending Changes after any significant change of a problem, its sources, or tests
  • if manual samples are updated, all problem Statements are submitted for processing
  • when updated, a problem Statement is automatically submitted for processing
• Other fixes and adjustments
  • generator samples are not shown in HTML statements
  • cache update for Problems, Contests, and Teams
  • Articles can now be submitted for processing from the management page
  • website meta headers

• Problem statements
  • HTML statements are now available
  • HTML statement is shown by default where possible
  • sample input and output can be easily copied in the HTML view
• Problem page design
  • both contest and archive problem pages have the new design
  • the new design combines an HTML statement and submission section on the same page
  • users can switch between HTML and PDF views
  • easy navigation to the problem submission section and other contest problems via sibling tabs
• Teams and contests
  • all members can now access a contest on behalf of the team
  • only the captain can register the team for the contest
  • in case there are multiple contest registrations affiliated with a user, an individual or captain registration will have the priority, otherwise, the oldest registration will be used

• Interactive problems
  • an interactive Problem uses an interactive Checker
  • a solution and a checker communicate to each other via standard input and output using the protocol specified in the problem
• Singe test run
  • problem setters, contributors, and administrators can run a solution on a single test
  • the detailed execution report includes all input and output files as well as judge verdicts, running times, and used memory
  • the execution data can be downloaded as a ZIP archive

• Account confirmation
  • before using your account, you must confirm it first by following a verification link sent to your email during the registration
  • if an unconfirmed user tries to log in by providing their correct password, a new verification link will be generated and sent to the email address
• Password reset
  • if you have forgotten your password, you can generate a password reset link which will be sent to your email
  • if an unconfirmed user tries to reset their password, an account confirmation link will be sent to the email first

• Judge
  • new C++ 17 compiler
  • optimized judge queue management
• Performance
  • web pages are rendered faster
  • the platform can serve a higher number of concurrent users
• Contests
  • public access mode to contest statements, problems, and clarifications
  • new scoreboard type Problem allows displaying contest leaderboard separately for each problem
• Problems
  • visualizer support
  • non-manual sample tests
  • statement tab on a contest problem page
  • in Problem scoreboard mode, there will be a corresponding tab on a contest problem page
  • Tags can be assigned to problems by Writers and Admins
• Other fixes and adjustments
  • resources can be updated
  • display of date and time missing values
  • user account update roles action fix

• Internationalization
  • translatable text support in Articles and Events
• Sponsors page
  • responsive layout
• Other fixes and adjustments
  • email broadcast improvements
  • time zone fix for date and time input
  • social links layout

• Problem archive
  • the new User solutions section lists all users who successfully solved the problem
  • Solved by on the archive index page is now a link to the corresponding User solutions section
• Statements and Articles
  • localized image and figure labels
  • additional LaTeX packages can be added via the Custom Imports section
• Problem management
  • submit problem action available directly from the problem management page
  • interactive test generation progress on the Result section
  • direct access to submission source code for both Checker and Scorer
• Email broadcast
  • new admin section Broadcasts
  • filter recipients by contest participation, their submission activity, and rank
  • email message template editor
• Other fixes and adjustments
  • SVG favicon with the 16x16 ICO as a fallback
  • new contest group SVG icon sets: country flags and Ukrainian region coat of arms
  • fixed contest problem submission page when only file option is available
  • ​invalid date fix for non-required values like event Start and End
  • timeanddate.com links are now opened in a new browser tab

• Time and date
  • ​relative timestamps, e.g. a week ago, display the absolute time and date on hover
  • absolute timestamps are rendered in the user language and time zone
  • event Start and End are links to the corresponding page of timeanddate.com
• Problem statements
  • fixed hyphenation for the Ukrainian language
• Resources and source codes
  • article or problem resources can be made public
  • problem source code can be made viewable to the public
• Contest registration groups
  • contest registration group selections can have images, e.g. countries with flags
  • a scoreboard shows participants with corresponding images on the right
  • an admin contestant page displays all registrations with group selections and their images
• Other fixes and adjustments
  • fixed ​contestant registration by admin page
  • database connection improvements

• New web site pages
  • ​About
  • Platform Release Notes
• Left black menu improvements
  • collapsed \ expanded state persists between page visits
  • mouse hover in collapsed state shows only one menu item
  • menu header displays Algotester logo
• Contest registration enhancements
  • contest settings allow up to two registration group sets
  • unofficial participation has separate contest settings including groups
  • contest admin can edit registration entry
• Scoreboard fixes and changes
  • ​interactive scoreboard fixes
  • unofficial participants have no rank and different style
• Other fixes and adjustments
  • ​table data loader works fine in Internet Explorer
  • better automatic locale detection in case if no language provided by the request