Indonesia National Contest 2008 yang diselenggarakan pada tanggal 1 dan 15 Juni 2008 oleh Binus University telah berakhir. Berikut adalah cerita dari saya tentang INC 2008 seputar tim-tim para juara dan pembahasan untuk soal babak final INC 2008. Selengkapnya bisa dilihat disini.

My hosting server is not Singcat anymore... their stability is horrible. I moved the hosting to DreamHost and just completely migrated the data and scripts. I hope this site never goes down again (at least not as often as before).

I have just finished writing up my story about ACM ICPC Regional Singapore 2007.

ACM ICPC Regional Singapore is really crowded this year: view team roster. So many Indonesian IOI-ers. It's more like a reunion for TOKI (Tim Olimpiade Komputer Indonesia).

My team name is "TOKIERS 020606", consists of me (TOKI 2002), Aditya Kristanto Goenawan (TOKI 2006), Daniel Aris Pandu Prasetia (TOKI 2006). See u all at NUS :D

Tim Olimpiade Komputer Indonesia (TOKI 2007) berhasil meraih 4 medali perunggu di pertandingan International Olympiads in Informatics (IOI Croatia 2007). Berikut adalah keempat anggota TOKI 2007 beserta point yang mereka dapat di IOI 2007:

Brian Marshall (230)
Riza Oktavian Nugraha Suminto (208)
Ricky Jeremiah (205)
Karol Danutama (203)

Cut-off points untuk medali emas adalah 388, perak adalah 286, dan perunggu adalah 187. Hasil selengkapnya bisa diliat disini.

Sekali lagi selamat untuk TOKI 2007 dan semua pihak yang membantu meraih hasil tersebut.

Hallo para peserta/mahasiswa/i atau siapapun yang tertarik untuk melihat soal-soal beserta pembahasan lomba Bina Nusantara Programming Contest 2007 (BNPCCS 2007) yang sekarang berubah nama menjadi Indonesia National Contest (INC 2007) bisa melihat write-up saya untuk babak penyisihan (tanggal 10 Juni 2007). Lihat write-up selengkapnya.

Continuing my previous post. It turned out that my hosting server got a hard-disk problem and had to move all the scripts to one of the existing PHP4 server. That's when I thought my PHP server engine was downgraded.

However, singcat managed to find a new PHP5 server and move back my scripts there. So, all UVA scripts should work fine. I'm updating the UVA ranklist now.

My hosting server, singcat.com, recently changed the name-servers. As the consequence, my site cannot be accessed for more than 2 days.

What's horrible is that all the data in my website is gone. Even though I backup some of them, it's not the latest. The worst part is that in the new server, they only have PHP4 whereas my scripts are all PHP5! This is a total disaster.

It's really difficult to contact the admin (the helpdesk is problematic) and even if get contacted, they only reply in one line which doesn't solve the problem. I'm tired of contacting them and decided to downgrades my php scripts :(

It'll take a while before all the scripts working again, sigh...

I've just finished the writeup. Find it at the story menu or just click here. You can post the comments/suggestion on that page.

The 31st ACM International Collegiate Programming Contest World Finals (ACM-ICPC-WF-07) sponsored by IBM has finished on March 15, 2007 at Hilton Tokyo Bay Hotel.

The final standings can be found in this site and find the final standings, the problem set, photos and videos, etc. In case the link went obsolete (if you view it one year later), you have to browse it in the history page. In case you still can't find it, just look at the result here:

The world champion of ACM ICPC World Final 2007 is Warsaw University with 8 solved problems. The awards are divided into 3 groups: Gold, Silver, Bronze each contains 4 teams. So there are 12 teams received the awards. There are many teams having a close race therefore they receives the same rank (rank 14 for teams who solved 5 problems, rank 26 for teams who solved 4 problems, and rank 44 for teams who solved 3 problems). The rest of the teams received honorable mention. Below is the official standings (copied from icpc.baylor.edu:

Currently I'm compiling my team (YoiAC, Bina Nusantara) story for this event. It'll take a while. This time I video taped some of the event. I wonder whether I should publish the video as well...

Now all HTTP requests to Felix-Halim.NET will be responded using "Content-Encoding: gzip" if possible. This reduces the transfer time and network traffic tremendously.

PHP made it so easy to achieve this: just by adding this line at the very beginning of the script:

ob_start("ob_gzhandler");

The Hunting UVA Problems has an SVG graph which shows the progress of your submissions to UVA year by year. The graph is now colored, so not only you can see your progress but also your language-shift ;) That is when your submission language turns from C to C++ or to Java or to Pascal. A picture worth a thousand words, see it here (you need SVG enabled browser, i.e. Firefox 1.5+).

I have just finished rewriting the script for Hunting UVA Problems. Not only I make it work again, even better if you see the running time to generate the statistics is faster than ever (under 1 second, previously were more than 3 seconds).

Also if you have noticed, the URL for Valladolid OJ start with /uva/ instead of /oj/, however the old URL is still valid. I only put some .htaccess for URL rewriting to make it easier to remember and type.

I tried to sync felix-halim.net server with UVA site but it appeared that the connection to UVA site is very-very slow or is UVA server overloaded? If you tried to checked the "update-from-uva" check-box while updating your statistics, you will notice it takes up to 20 seconds just to read a page from UVA.