3: Educational
Tutorials
Tutorials
Highly recommended reads for those who are starting out. In particular, everyone should know how to do I/O (input/output) and dynamic programming. Introduction to Algorithms
Practice
Practice
The following websites not only contain many problems, but they also host programming contests! A great place to practice under time pressure. You may also read code submitted by other users.
For a broader variety of problems you can also visit the following sites.
More links
More links
- UVA toolkit -- a very large collection of links by UVa
- XRDS articles on competitive programming: ( 1 ) ( 2 )