A Programming Contest associated with ICFP and organized yearly since 1998! https://icfpcontest2025.github.io/https://bsky.app/profile/icfpcontest.bsky.socialhttps://bsky.app/profile/icfpcontest.bsky.social/post/3mrmvtfeikk2yThat's it! The ICFP 2026 Programming Contest has come to an end. We'll be working on writeup(s) about running the contest; we hope teams do their own writeups! We will link team writeups from the site. We're also planning to keep the little men around somehow :)27 Jul 2026 12:34 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3mrmvtfeikk2yhttps://bsky.app/profile/icfpcontest.bsky.social/post/3mrln34csek2pJust under 12 hours remain in this year's contest and the top five are all very close! Good luck in the last leg of the contest - we hope your little men behave themselves27 Jul 2026 00:25 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3mrln34csek2phttps://bsky.app/profile/icfpcontest.bsky.social/post/3mrhuqhd3h22aThe lightning round has ended! We are releasing two more pieces of content: * Semester 4 - 4 new hard problems - on the problem sets page * A new instruction called "split" Read more about split here: icfpcontest2026.com/split25 Jul 2026 12:31 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3mrhuqhd3h22ahttps://bsky.app/profile/icfpcontest.bsky.social/post/3mrfdo3wurc2jThis year's ICFP programming contest has begun! To get started, read the textbook: icfpcontest2026.com/textbook24 Jul 2026 12:21 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3mrfdo3wurc2jhttps://bsky.app/profile/icfpcontest.bsky.social/post/3mqrsbtzx722hThe ICFP programming contest is next week! This year's contest will focus on the little men running around inside your computer icfpcontest2026.com has everything you need to participate16 Jul 2026 17:49 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3mqrsbtzx722hhttps://bsky.app/profile/icfpcontest.bsky.social/post/3mqf5cbollc2lPre-registration for this year's ICFP programming contest is open! You may register your team at your leisure at icfpcontest2026.com/signup The contest begins on July 24th - just under two weeks to go! https://icfpcontest2026.com/signup11 Jul 2026 17:01 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3mqf5cbollc2lhttps://bsky.app/profile/icfpcontest.bsky.social/post/3mnxilqi6mc24The ICFP 2026 Programming Contest will run from July 24th to July 27th. We'll get icfpcontest2026.com updated with more information on the contest in the coming weeks :) https://icfpcontest2026.com10 Jun 2026 19:56 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3mnxilqi6mc24https://bsky.app/profile/icfpcontest.bsky.social/post/3m35dhchark2yThe winners have been announced! Congratulations to the teams Unagi and MOYOU for a joint first place finish in the ICFP Programming Contest 2025! icfpcontest2025.github.io/prizes.html https://icfpcontest2025.github.io/prizes.html14 Oct 2025 08:41 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3m35dhchark2yhttps://bsky.app/profile/icfpcontest.bsky.social/post/3lyzg4ophu225Now that the competition is over, Adso has penned his reflections. icfpcontest2025.github.io/afterword.pdf We also have many team write-ups here: icfpcontest2025.github.io/writeups.html Please let us know if you have some to add to the list! https://icfpcontest2025.github.io/afterword.pdf17 Sep 2025 08:28 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lyzg4ophu225https://bsky.app/profile/icfpcontest.bsky.social/post/3lyd5qyo7wc2bThat's it! Finita est! The ICFP 2025 Programming Contest is over! Be sure you have submitted your code. Also, please share writeups with us describing your solutions and your thoughts on the problems! These can be shared on discord and we will put links to them on the website.08 Sep 2025 12:00 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lyd5qyo7wc2bhttps://bsky.app/profile/icfpcontest.bsky.social/post/3lyd5236p2k2bThe contest ends in less than 15 minutes! Please submit your code (according to instructions in the task description) to be considered for prizes08 Sep 2025 11:47 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lyd5236p2k2bhttps://bsky.app/profile/icfpcontest.bsky.social/post/3lycx53td7k2oWe have frozen the public leaderboards, because we are in the final two hours of the contest. Explore quickly!08 Sep 2025 10:01 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lycx53td7k2ohttps://bsky.app/profile/icfpcontest.bsky.social/post/3lyatfqlp722lWe have fixed a bug that caused the random generator for the advanced levels to occasionally generate maps that were significantly harder to solve than intended. Sorry for the inconvenience!07 Sep 2025 13:49 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lyatfqlp722lhttps://bsky.app/profile/icfpcontest.bsky.social/post/3ly6dmt4rwy2zThe public leaderboards are now updating again. Hilariter hackate!06 Sep 2025 14:01 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3ly6dmt4rwy2zhttps://bsky.app/profile/icfpcontest.bsky.social/post/3ly64utkfsp2dThe lightning round is now over, and a new batch of problems have been released! Check our task description page to see how to solve them! icfpcontest2025.github.io06 Sep 2025 12:01 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3ly64utkfsp2dhttps://bsky.app/profile/icfpcontest.bsky.social/post/3ly5w5ln2ay2hThe lightning round ends in two hours! The public leaderboards have now been frozen to keep the lightning winners a mystery until our grand reveal at ICFP 2025 in Singapore. They will be back in 4 hours (i.e. two hours after the lightning round ends).06 Sep 2025 10:00 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3ly5w5ln2ay2hhttps://bsky.app/profile/icfpcontest.bsky.social/post/3ly3rx3cca22lWe have made a slight adjustment to the rules. Now route plans are limited in length. Please see the updated spec.05 Sep 2025 13:40 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3ly3rx3cca22lhttps://bsky.app/profile/icfpcontest.bsky.social/post/3ly3mgzhjqq2rIncipit! The ICFP Programming Contest 2025 has begun. See our website for the task description. The aedificium awaits! icfpcontest2025.github.io05 Sep 2025 12:01 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3ly3mgzhjqq2rhttps://bsky.app/profile/icfpcontest.bsky.social/post/3ly2rkjocd52uIn eight hours, the contest begins. Praeparate vos!05 Sep 2025 04:00 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3ly2rkjocd52uhttps://bsky.app/profile/icfpcontest.bsky.social/post/3lxzwrhdwgw2sTempus breve est!04 Sep 2025 20:01 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lxzwrhdwgw2shttps://bsky.app/profile/icfpcontest.bsky.social/post/3lxz426yrun2sUnus dies superest! The ICFP Programming Contest begins in 24 hours!04 Sep 2025 12:02 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lxz426yrun2shttps://bsky.app/profile/icfpcontest.bsky.social/post/3lxyb353buc2uNomina vincta tenemus.04 Sep 2025 04:00 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lxyb353buc2uhttps://bsky.app/profile/icfpcontest.bsky.social/post/3lxxgbrnb6524Calculum agite! Calculum agite!03 Sep 2025 20:00 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lxxgbrnb6524https://bsky.app/profile/icfpcontest.bsky.social/post/3lxwlnbpjpk2rPost quadraginta octo horas incipit.03 Sep 2025 12:04 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lxwlnbpjpk2rhttps://bsky.app/profile/icfpcontest.bsky.social/post/3lidxk6ezkd2vThis year's contest will be held from Friday 5th Semptember 2025 at 12:00 UTC to Monday 8th September 2025 at 12:00 UTC. There will be a lightning division, ending on Saturday 6th September 2025 at 12:00 UTC. Details at our website below! https://icfpcontest2025.github.io17 Feb 2025 04:58 +0000at://did:plc:2iqgi7fse75ctahghu4ltfdf/app.bsky.feed.post/3lidxk6ezkd2v