Links..

Online judges
ACM Live Archive, has many problems from past ACM/ICPC regional contests and world finals.
Arbiter, online judge at Sharif University in Iran.
FZU Online Judge, about 500 problems.
Harbin Online Judge
HDU Online Judge, has virtual contest features and quite a lot of problems.
Hunan University ACM/ICPC Online Judge, seems to have a lot of problems from regional contests. [...]

DataStructures- Maxiumum subsequence problem

Problem:
Given (possibly negative) integers A1,A2,…An, find the maxiumum value of the sub array.
Solution:

#include <stdio.h>

#define SIZEOF(arr) (sizeof(arr)/sizeof(arr[0]))

int arr[] = { 2, -3, 4, -1, 5, -1, -3, 6, -1, -1, -4, 2, -1};

void MaxSum(int arr[],int length)
{
int max,sum;
int i = 0 ;

[...]

Olympiads in Informatics Journal (by Matematikos ir informatikos institutas)

Contents

Volume 2

 
Foreword (3-4)
Benjamin A. BURTON
Breaking the Routine: Events to Complement Informatics Olympiad Training (5-15)
Benjamin A. BURTON, Mathias HIRON
Creating Informatics Olympiad Tasks: Exploring the Black Art (16-36)
Emanuela CERCHEZ, Mugurel Ionut ANDREICA
Romanian National Olympiads in Informatics and Training (37-47)
Arthur CHARGUÉRAUD, Mathias HIRON
Teaching Algorithmics for Informatics Olympiads: The French Method [...]

Very Incomplete Online Contest Systems..

Well, everywhere in the world many incomplete online judges have been initiated, here goes some: if you know more… please add in the comment
http://contest.cronysoft.com/

Independent Paragraphs (II) by Shahriar Manzoor

The content of the article that I am about to write is triggered by (a) my semi recent visit to USA to attend and Judge in ACM International Collegiate Programming Contest 2006, World Finals (b) an email from a former contestant of Bangladesh (now studying in Stony Brook University, USA) and (c) something more. The [...]

ACM International Collegiate Programming Contest maintained by the George Mason University∞

 Hello Programmers!
Look at this wonderful site for ACM-ICPC problemsolvers!
https://vo.homelinux.org/wiki/code/ACMProblems
This is a site of programming problems and solutions for the ACM International Collegiate Programming Contest∞. It is maintained by the George Mason University∞ chapter of the Association for Computing Machinery∞. See the GMU ACM Website∞ for details on meetings, events, and ACM chapter information. See GMU [...]

BEST LINKS!!! ACM-ICPC

ACM/ICPC official website
NWERC 2008, next year’s regional contest in Utrecht, Netherlands (November 22-23 2008).
NWERC 2007, last year’s regional contest where we placed 4th and 9th out of 51 teams.
UVA problem solver links section, check out this collection of links to see what options for practising exist out there.
Explanation of the ACM ICPC, the contest that [...]

ICFP Programming Contest

Finally, the results are here.

Table with results for the main division
Top ten submissions, with winner of each track highlighted in red.
Table with results for the lightning division

Highlights

…the first 100 email addresses submitted for contest information (later we received over 650). Four people did not receive information because when they entered their email addresses, they could [...]

Online judge

From Wikipedia, the free encyclopedia

An online judge is an online system to test programs in programming contests. They are also used to practice for such contests.

The system can compile and execute your code, and test your code with pre-constructed data. Submitted code may be run with restrictions, including time limit, memory limit, security restriction and [...]

About MathWorld http://mathworld.wolfram.com

MathWorldTM is the web’s most extensive mathematical resource, provided as a free service to the world’s mathematics and internet communities as part of a commitment to education and educational outreach by Wolfram Research, makers of Mathematica.
MathWorld has been assembled over more than a decade by Eric W. Weisstein with assistance from thousands of contributors. Since its [...]