Some (Useful?) Links for Beginners

1.uva.onlinejudge.org/140
UVa Online Judge

2.icpc.baylor.edu/past/icpc2007/Re ... eport.html22
Official International Collegiate Programming Contest (ACM) site, 2007 results (You can change 2007 in URL to 2006, 2005, etc.)

3.oi.edu.pl/24
Polish Olympiad in Informatics

4.ipsc.ksp.sk/19
Internet Problem Solving Contest - Comenius University

5.informatik.uni-ulm.de/acm/12
ACM Programming Contest at the University of Ulm

6.hsin.hr/20048
hsin.hr/coci
Crotian Olympiad in Informatics 2004 (You can change 2004 in URL to 2001, 2002, etc.)

7.mathworld.wolfram.com/35
Mathworld, many useful mathematical resources

8.forums.topcoder.com/11
apps.topcoder.com/wiki/display/t ... t+Analysis9
Topcoder Forums & wiki, many programming resources

9.plg1.cs.uwaterloo.ca/~acm00/13
Waterloo Programming Contest official web page.

10.web.mit.edu/acmicpc/www/28
The MIT Programming Contest

11.spoj.pl/forum/viewforum.php?f=4015
DASM Programming League (hosted in SPOJ) discuss & solutions.

12.ace.delos.com/DEC088
Usaco Contest (December 2008) Results and solutions.(You can change DEC08 to MAR07, Jan09, etc.)

13.cemc.uwaterloo.ca/contests/past_contests.html8
Canadian Computing Competition Official Website.

14.livearchive.onlinejudge.org/11
ACM-ICPC past contests' problemset archive

15.ideone.com/36
Online program-testing website, using your own program and input file

Any other good site links are welcome.