TL;DR: Come solve 3 spooky problems a day in October 2025 Long Challenge from October 27 through November 3, UTC 4am time.
I'm hosting a Halloween-themed contest on EldarVerse! Each day will feature three problems of increasing difficulty — from something like Codeforces Div2 A to something like Div2 E.
I want to thank asdasdqwer, JunkieDonkey, fextivity, and likithreddy949 for their help testing the problemset.
Special thanks to Golovanov399 for additional testing on a short notice <3
Hope to see you on the leaderboard!
P.S. Contest format is a mix of Meta Hacker Cup (download inputs, submit outputs) and Advent of Code (each problem is worth 100 points, each subsequent solver gets 1 less point).










Auto comment: topic has been updated by gojira (previous revision, new revision, compare).
Alright friends, this starts in under 1 hour. See y'all there!
I could only test a small part of this, but I liked the problems! It's not the kind of fun you can get on Atcoder contests, but more like the type closer to advent of code, cloudflight coding contest or maybe even ipsc. Again, maybe this doesn't apply to most of the problems, but it applies to some hard ones I tested. Also, the amount of effort put into creating this is clearly very high, so I would say it's another reason to participate!
(one of the reasons I tested this round was because I don't like waking up early, otherwise I probably wouldn't have)
Thank you for helping with testing, and thank you for the kind words! IPSC was an amazing competition, this comparison is an honor.
Day 2 unlocks in 10 minutes!
Day 3 starts in 10 minutes! Here's a sneak peek of what you'll deal with today:
Day 5 unlocks in 20 minutes!
Day 6 unlocks in about an hour! Here is a sneak peak of what you'll encounter:
Day 7 unlocks in 30 minutes! There are still 24 hours left in the contest, so if you haven't tried it yet, this is your chance to successfully waste your entire weekend!