|Bug in points and ranking system||1||10||22h|
|EMILABC Missing Test Case||3||12||1d|
|How to practice on SPOJ?||2||29||3d|
|Stuck with this problem : SP288 PON||4||38||4d|
|Confused on NPC2015E||1||17||5d|
|Stuck on eof of CCHESS problem||4||27||5d|
|Stuck on TSHPATH||13||45||5d|
|Profile page not getting updated||5||49||8d|
|What happened to my ranking and my AC problems?||11||110||9d|
|Any hints to solve this problem||1||51||13d|
|Why did so many problems disappear recently?||3||61||14d|
|Divisibilité par 15||2||46||14d|
Are you passionate about coding?
Try your luck in a brain challenge and join ADB Brain Wars contest!
ADB Brain Wars is a contest organized for Polish programmers.
Check the details at: adb-brain-wars.com
Win great prizes and have a lot of fun!
The elimination round begins on the 25th of March
Innopolis Open 2018
Seven days left to register for the Innopolis Open - Olympiad in Informatics for high school students under 19 years old held by Innopolis University. The Olympiad has two stages: the online contest and the on-site competition.
- It is a top-level contest - the problems on the Olympiad meet the level of the Russian Olympiad in Informatics. Contests are prepared under the guidance of the World Finals Champions of ACM ICPC.
- Scholarship - winners of the second (on-site) stage will have an opportunity to be enrolled in Innopolis University without any admission tests.
- Prizes – participants with the best results at the online contest will be invited to the final stage to Innopolis, the final stage winners will receive valuable prizes and souvenirs. Accommodation and meals are covered by the organizing committee.
To find out more about the Olympiad, please, visit our page: http://2018.olymp.innopolis.ru/en/
The first stage (online contest) will be held on:
- December 2, 15:00 (UTC +3),
- December 17, 10:00 (UTC +3).
You may participate on both dates; the organizing committee will consider your best result. Registration is open until December 1, 2017. Participation is free of charge.
The second stage (on-site contest) will take place in Innopolis city on February 24-25, 2018.
Stay in touch
Coding can give more fun than computer games – an interview with Ivan Katanić
After publishing an interview with Keshav Dhandhania we have decided to continue this project and present you other successful Spoj users, who can share their experience and all wisdom gained during their struggle with Spoj problems.
Today we present you Ivan Katanić a finalist in International Olympiad in Informatics a member of Croatian national team in computer contests and a long-time Spoj user with a #11th place in a world rank and almost 1000 solved problems.
Bubble Cup X
Microsoft Development Center Serbia is excited to announce the start of the 10th anniversary edition of Bubble Cup competition!
Bubble Cup is an international, ACM-style team contest aimed at university and high school students.
You can register now on BubbleCup.org. Qualifications consist of two online rounds which start on the 1 st of April and on the 1 st of May and last for 25 days each. Both online rounds will feature several problems from the Sphere Online Judge. Ten best university teams and ten best high school teams will compete in the 5 hour long finals in Belgrade in September.
Teams can consist of high school pupils or students. Students must attend the same university. Complete rules can be found here.
There are going to be some great prizes awaiting the winners! More detailed information on prizes is coming on the website soon.
We wish you best of luck in competition! Let the coding begin!
Big languages update!
We are happy to announce that we have updated our languages database.
There are six new languages - one of them is a Swift which was on the top of your wishlist!
Please visit the article on our blog to learn more details!
From Spoj challenge to own startup. Short interview with Keshav Dhandhania
We would like to invite you to a completely new series of short interviews with successful Spoj users, we will talk about their projects and their first steps in the world of coding. If you think that you have your own story that can inspire others, write to us!
Here's our first interview with one of old Spoj users: Keshav Dhandhania, a co-founder at Compose Labs, a San Francisco-based company that has just released their first project Commonlounge (with a special community for Spoj users too!).
University Innopolis is organizing and holding Innopolis Open, an Olympiad in Informatics for secondary school students (until 19 y.o.). The Olympiad consists of two rounds — online contest and the on-site competition (held at Innopolis, Russia).
Winners of the first round will be invited to Innopolis to take part in the on-site competition. During the Olympiad, all participants will be offered a free of charge accommodation, meals and transfer from Kazan to Innopolis and back.
Winners of the second (on-site) round will receive awards and can be enrolled in Innopolis University without any admission tests.
- The first (online contest) round will start on December 18 at 10.00 a.m. (UTC +3).
- The second (on-site) round will take place on February 25-26 in Innopolis city, Russia.
Registration is open until December 15, 2016. Participation is free of charge. Please follow the link to register and find detailed information: https://olymp.innopolis.ru/en/ooui/16-17/
Registrations are now open for CodeChef SnackDown - a global programming contest | Qualifier starts on 27th May 2016!
CodeChef SnackDown is a multi-round computer programming contest, it will witness coders from schools, colleges, and organizations, across all ages, competing against each other on a global platform. This year there will be world's best 25 teams battling out with India's best 25 teams in Mumbai for the ultimate title of “SnackDown Champions” and hefty cash awards worth $22,500, a lucrative job offer with Directi, and plethora of cool SnackDown merchandises. The registrations are now open and the qualifying round will start on 27th May 2016. More information about the contest can be found here: https://www.codechef.com/snackdown/2016.
Passionate about algorithmic tasks? Take part in the eighth edition of international programming marathon Deadline24!
The teams of three may register up until February, 25. They will compete in the qualifying round online on February 28. For more information http://www.deadline24.pl.
Let the programming spirit flourish! Spoj.com becomes community partner in IndiaHacks
Spoj.com is happy to become a Community Partner of Hacker Earth in their flagship event - IndiaHacks, the world's largest developer confluence, which aims to encourage programming and celebrate the spirit of coding among developers.
It comprises of a combination of online hackathons and programming contests. This massive event commenced on January 8th, 2016 with Fintech Hackathon and Bot Challenge programming contest - two of the nine technology tracks, scheduled for the month long code fest. The other tracks open for participation for developers are Algorithms, Machine Learning, IoT, Game development, Open Source, Online Commerce, Travel and Transportation. These hackathons will see developers build unique and interesting products in only 48 hours.
The top 20 teams/individuals from the online phase will be shortlisted from each track and will be invited to the offline conference, where they will again hack for 24 hours and present their ideas to a panel of judges. Developers also get to win some cool prizes like a Trip to San Francisco, Xbox One, Go Pro 4 and much more.
So if you are developer or a coder, register and participate in IndiaHacks ->http://hck.re/x4pyxe
NASA and Freelancer’s Space Contest
For the first several contests, help build tools for the Robonaut R2, a robotic assistant used to help humans work and explore in space. Why not take this chance to be a part of humanity's journey to go beyond Earth's orbit and explore the vast wonder of space? Join the contests now.
Enter Coding Chill-out zone
Remote session : 26.06 - 03.07 2015
On-line session is OPEN for any registered users. Two categories: students & IT Pros. Join today and share our passion for coding. Code from your own #CodingChillout zone and rank high! Grab paid GitHub plans and Cloud computing tokens offered by Octawave.
Are you in Malta?
GOTO: On-site event in Malta on 11th July @Microsoft Innovation Center. All in relaxed and chilling climate of Maltese islands ... Just simply Enter Coding Chill-out zone, add song to the event playlist...and do what you LOVE. Register today: http://codechillout.sphere-contest.com
CodeChef SnackDown 2015 - Code Your Heart Out
To honor the very long service of our old checkers, we would like to share a little more of their background story with you. The SPOJ website is developed and maintained by Sphere Research Labs. The "sphere" is cited in described in many sources as the perfect three-dimensional shape - the model of beauty and excellence. The naming convention for our computing clusters is also based on spatial geometry: our servers' names include "Cubes", "Cones", "Pyramids", and "Prisms".
SPOJ started out in 2004 with a bunch of vintage 266MHz machines named "Cones". These were very soon completely replaced by the freshly withdrawn "Pyramid" cluster. The single computing unit for "Pyramids" was the Intel Pentium III 733 MHz, and submissions at SPOJ were allowed to use up to 256MB of memory. The slowness of Pyramids by today's standards was often seen by problem setters as an advantage: it was possible to distinguish fast algorithms from slow ones without creating enormous datasets. The new "Cube" cluster consists of modern and fast Intel Pentium G860 CPU's and your submissions are run with a 1536 MB memory limit.
The chart below shows the number of pieces of code executed annually on the "Pyramid" cluster, between 2004 and last year. That's exactly 10074843 submissions in total. Since 2012, you can also see how many submissions were executed using the "Cube" cluster. The two clusters were almost equally loaded in 2014.
The last Pyramid submission was executed on 2015-03-02 at 10:51:35. We turned off the Pyramid cluster on the same day at noon GMT+1.
We hope that when we share the next chart with you at some point in the next 10 years, the submission rate will still be increasing at least as quickly as in the last decade!
Lambda Days 2015 Challange
Even if you are not interested, you may find there a link to the world records in this field. You may be surprised.
Do you teach algorithms, data structures or programming paradigms?
Badges for SPOJ by Ricardo Bittencourt (ricbit)
Are you a novice in programming?
High School Programming League 2012/13 final results. The winner is Tomasz Rewak. Congratulations!
Top 5 contestants:more ...
Top 3 Teams:
|1||Gimnazija "Veljko Petrović", Serbia
(Coach: Duško Obradović)
|2||Zespół Szkół UMK: Gimnazjum i Liceum Akademickie, Poland
(Coach: Anna Beata Kwiatkowska)
|3||Zespół Szkół Techniczno - Informatycznych w Gliwicach, Poland
(Coach: Daniel Kuśka)