Reference

Google Code Jam 2006
http://www.google.com/codejam/

Programming Contests, Software Development, and Employment Services at TopCoder
http://www.topcoder.com/

via

Google Japan Blog - 2006-08-25 - Google Code Jam に参加してみませんか?
http://googlejapan.blogspot.com/2006/08/google-code-jam.html