Contest

Welcome to the 12th International 24-hour Programming Contest!

Rules

The contest starts at 2012-04-28 09:00 CEST and ends at 2012-04-29 09:00 CEST.

No solution can be submitted after the 24 hour time is up.

Web server

General contest related information will be available on our web server at http://server.ch24.org/.

Submission site

The same submission system will be used as during the Electronic Contest. It will be available at http://server.ch24.org/sub/.

Task summary

There are various kinds of problems, with various scoring rules and submission methods. Here we provide a short summary:
Task Web submission Interactive Score decreases with time Penalty for wrong answer Time delay after fail/pass Scaling Scheduled Max score
A Yes No Yes -5 0/0 No No 1000
B Yes No Yes -5 0/0 No No 1000
C Yes No No -5 5/1 Yes No 1000
D Yes No Yes -1 2/0 No No 1000
E Yes No Yes -5 0/0 No No 1000
F Yes No Yes -5 0/0 No No 500
G Yes No Yes -5 5/0 No No 500
H No Yes No 0 0/0 Yes Yes 2500
I No Yes No 0 0/0 No No 1000
J No Yes No 0 0/0 No Yes 2500
K No Yes No 0 0/0 No Yes 3500
L Yes No No 0 0/0 Yes No 1000

Ports

Port TaskService descriptionConnection direction
server <-> team
80 - web <-
6667 - irc <-
u4242 - time server, UDP broadcast destination port ->
u123 - ntp server <-
u53 - dns server <-
u67,u68 - dhcp server <-
u30002H (TV - Stream)TV stream UDP broadcast destination port ->
31000 H (TV - Stream)Aircraft ID report connection <-
22000 I (Air hockey)Practice client control connection <-
u22200I (Air hockey)Practice UDP broadcast destination port ->
20000 J (Air hockey)Tournament client control connection <-
u21002J (Air hockey)Tournament UDP broadcast destination port ->
10001 K (WW3)Practice server control <-
10002 K (WW3)Practice server game connection <-
10003 K (WW3)Practice server telnet view connection <-
10012 K (WW3)Tournament server game connection <-
10013 K (WW3)Tournament server telnet view connection <-

Ports starting with u are UDP ports.

The UDP broadcast destination ports should be opened by the teams (if they are interested in the broadcast).

All other services are hosted on server.ch24.org.

Schedule of interactive tasks

time slot starts at Air hockey WW3 TV stream
relative CET scored practice scored practice scored
00:00 09:00 - 24 hours - 24 hours 24 hours
00:30 09:30
01:00 10:00
01:30 10:30
02:00 11:00
02:30 11:30
03:00 12:00
03:30 12:30
04:00 13:00 tournament
#1
1 hour 30 minutes
04:30 13:30
05:00 14:00
05:30 14:30 -
06:00 15:00 tournament
#1
max. 4 hours
06:30 15:30
07:00 16:00 tournament
#2
5 hours
07:30 16:30
08:00 17:00
08:30 17:30
09:00 18:00
09:30 18:30
10:00 19:00 -
10:30 19:30
11:00 20:00
11:30 20:30
12:00 21:00 -
12:30 21:30
13:00 22:00
13:30 22:30
14:00 23:00 tournament
#2
max. 4 hours
14:30 23:30
time slot starts at Air hockey WW3 TV stream
relative CET scored practice scored practice scored
15:00 00:00 tournament
#3
9 hours
24 hours
(continued)
tournament
#2
max. 4 hours
(continued)
24 hours
(continued)
24 hours
(continued)
15:30 00:30
16:00 01:00
16:30 01:30
17:00 02:00
17:30 02:30
18:00 03:00 -
18:30 03:30
19:00 04:00
19:30 04:30
20:00 05:00 tournament
#3
max. 4 hours
20:30 05:30
21:00 06:00
21:30 06:30
22:00 07:00
22:30 07:30
23:00 08:00
23:30 08:30

Contact

General contest related information and data will be published on the web at http://server.ch24.org/.

Important announcements will be made on the #info irc channel and will be published on the web as well.

For general discussions and questions join the #challenge24 irc channel.

There will be separate channels for task related problems as well: #A, #B, #C, #D, #E, #FGH, #IJ, #K, #L.