South Western Europe Regional Programming Contest (abbreviated as SWERC) is an annual activity of the Association for Computing Machinery (ACM) that provides college students with an opportunity to demonstrate and sharpen their problem-solving and computing skills. The event is sponsored by IBM.
The ACM International Collegiate Programming Contest, ICPC, traces its roots to a competition held at Texas A&M University in 1970 hosted by the Alpha Chapter of the UPE Computer Science Honor Society. The contest evolved into its present form as a multi-tier competition in 1977, with the first finals held in conjunction with the ACM Computer Science Conference.
From 1977 to 1989, the contest included mainly teams from US and Canada. Headquartered at Baylor University since 1989, with regionals established within the world's university community, operating under the auspices of ACM, and with substantial industry support, the ICPC has grown into a worldwide competition with teams from 75 countries in 2004.
Since the beginning of IBM's sponsorship in 1997, contest participation has grown enormously. In 1997, 840 teams from 560 universities participated. In 2004, 4109 teams from 1582 universities participated. The number of teams keeps increasing by 10-20% every year and future competitions may be even larger.
The World Finals of the ACM International Collegiate Programming Contest World Finals, ACM-ICPC World Finals, is the final round of competition. Over its history it has become a 4-day event held in the finest venues world-wide. [UPE] recognizes all of the regional champions at the event. Recent World Champion teams have been recognized by their country's head of state and at the annual ACM Awards Ceremony.
The ICPC is a team competition. Current rules stipulate that each team consist of three students. Participants must be university students, who have had less than five years of university education before the contest. Students who have previously competed in two World Finals or four regional competitions are ineligible to compete again.
During contest, the teams are given 5 hours to solve between 8 and 10 programming problems (with 8 typical for regionals and 10 for finals). They must submit solutions as programs in C, C++, or Java. Programs are then run on test data. If a program fails to give a correct answer, the team is notified about that and they can submit another program.
The winner is the team which correctly solves most problems. If several teams solve an equal number of problems, the placement of teams is determined by the time when they submitted the correct solutions.
For example, consider a situation when two teams, A and B, solve two problems each. The team A submitted their solutions 1:00 and 2:45 after the beginning of the contest. The team B submitted solutions 1:20 and 2:00 after the beginning. Then, the total time is 1:00+2:45=3:45 for team A and 1:20+2:00=3:20 for team B and team B wins.
If, before submitting the correct solution, the team has submitted incorrect solution to the same problem, it receives a 20 minute penalty for each incorrect solution attempt.
Compared to other programming contests (for example, International Olympiad in Informatics), the ICPC is characterized by a large number of problems (8 or more problems in just 5 hours). Another feature is that each team can use only one computer, although teams have three students. This makes the time pressure even greater. Good teamwork and ability to withstand pressure is needed to win.
Regionals and World Finals
The contest consists of several stages. Many universities hold local contests to determine participants at the regional level. Then, universities compete in Regional contests. Winners of Regional contests advance to the ACM-ICPC World Finals. More than one team from a university can compete in regionals, but only one may compete at the world finals. From each region, at least one team goes to World Finals. Regions with large number of teams send multiple teams to finals (sometimes as many as 6 teams from one very large region).
No participant can take part in more than two World Finals.
Some large regions also hold Subregional competitions which are intermediate between local and regional contests.
2005 World Finals
The 2005 world finals were held at Pudong Shangri-La Hotel in Shanghai on April 6, 2005, hosted by Shanghai Jiaotong University. 4,109 teams representing 1,582 universities from 71 countries competed in elimination rounds, with 78 of those teams proceding to the world finals. Shanghai Jiaotong University won its second world title, with 8 of 10 problems solved.
The world finals champions since 1977 are:
- 2005 - Shanghai Jiaotong University, China
- 2004 - St. Petersburg Institute of Fine Mechanics and Optics, Russia
- 2003 - Warsaw University, Poland
- 2002 - Shanghai Jiaotong University, China
- 2001 - St. Petersburg State University, Russia
- 2000 - St. Petersburg State University, Russia
- 1999 - University of Waterloo, Canada
- 1998 - Charles University, Czech Republic
- 1997 - Harvey Mudd College, United States
- 1996 - University of California, Berkeley, United States
- 1995 - Albert-Ludwigs-Universität, Freiburg, Germany
- 1994 - University of Waterloo, Canada
- 1993 - Harvard University, United States
- 1992 - University of Melbourne, Australia
- 1991 - Stanford University, United States
- 1990 - University of Otago, New Zealand
- 1989 - University of California at Los Angeles, United States
- 1988 - California Institute of Technology, United States
- 1987 - Stanford University, United States
- 1986 - California Institute of Technology, United States
- 1985 - Stanford University, United States
- 1984 - Johns Hopkins University, United States
- 1983 - University of Nebraska, United States
- 1982 - Baylor University, United States
- 1981 - University of Missouri–Rolla, United States
- 1980 - Washington University in St. Louis, United States
- 1979 - Washington University in St. Louis, United States
- 1978 - Massachusetts Institute of Technology, United States
- 1977 - Michigan State University, United States
- TopCoder, a similar set of competitions conducted online.
- Universidad de Valladolid Online Judge
- ACM-ICPC Live Archive Around the World
- Harbin Institute of Technology Online Judge
- Ural State University Online Judge
- Zhejiang University Online Judge
- Tongji University Online Judge
- Saratov State University Online Judge
- Universidad de Palermo Online Judge
- Fuzhou University Online Judge
- Peking University Online Judge
- Tianjin University Online Judge
- Chittagong University of Engineering and Technology Online Judge
- Sun Yat-Sen University Online Judge
- Sphere Online Judge