Automatic discovery of solutions to programming problems on the web

There are lots of programming problems on the web, which are gathered together by online judge systems. The solution reports of the programming problems are scattered on different web sites. These programming problems and the corresponding solution reports are not organized effectively for tutoring programming. Students and teachers may hope that all the programming problems and their solution reports with programming knowledge are grouped into a learning sequence. For this purpose, a method is proposed here to organize the programming resources automatically to form a learning sequence. An experiment is given to illustrate that 40697 solution reports are discovered for 7181 programming problems from 4 different online judge systems. 10773 out of the 40697 solution reports result in a learning sequence according to the difficulty of each programming problem and the frequency of each knowledge point used by the solution reports.