NOI.PH has hosted its competitions on various online judges over the years.  We’re migrating the problem archive to our new online judge, Hurado. Some old problems are already there, but it will take a while to migrate everything. In the meantime, this page shall serve as a compilation of the different NOI.PH contests throughout the years.

For some contests, only their PDFs are available.  These contests were hosted on a CMS server set up by NOI.PH, which is no longer up.

Also, note that the judge data for some of the older HackerRank problems is no longer working.  In brief, HackerRank put out a breaking change to their internal infrastructure, causing the subtask grader to no longer work properly.  These problems are still collected here, as the problem statements are at least still readable.