The UVA Online Judge [1] is one of the largest and oldest programming competition sites on the web. They have a huge library with problems in pretty much any CS

The UVA Online Judge [1] is one of the largest and oldest programming competition sites on the web. They have a huge library with problems in pretty much any CS area. However it can be a little overwhelming at first, so is better to use UHunt [2], which categorizes problems according to difficulty and area, such as Data Structures, Computational Geometry, String Manipulation, etc. [1] http://uva.onlinejudge.org/index.php http://uva.onlinejudge.org/index.php [2] http://uhunt.felix-halim.net/id/339 http://uhunt.felix-halim.net/id/339