These are a few examples of complete problems.
This is a basic problem that asks for a program that computes the difference between integers. It should be a good starting point if you want to learn how the problem format works.
This is a simple example of an interactive problem where there is no fixed input to process, but the solution instead communicates back and forth with a validator program.
This is a problem that just asks for a program that prints Hello World!. It is a somewhat atypical problem since it does not have any
input. This problem also illustrates having problem statements in
more than one language.
This is an example of a scoring problem where submissions can get different scores depending on which test groups they solve. It also demonstrates how an input validator might check different constraints for different test groups. In addition, it reuses testcases across test groups using symlinks. The swedish statement showcases how to use images, footnotes and tables in Markdown.