Hello,
I have done most to all of the USACO platinum problems and am looking for OI's that are of similar difficulty and content level. Is there a list or something that ranks the OI by relative difficulty?
-dx24816
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I don't remember any rankings, maybe some discussions will help. I guess JOISC and IOI problems are kind of the same difficulty with USACO platinum and you can practice them.
Thanks for the reply! Do you know where I could find editorials for the JOISC problems?
For JOI 2017 you can read problem hints here. For other years it can be quite difficult, but at least there are discussions on codeforces and editorials on Japanese with codes.
This repo may help for OI editorials.
Someone should make a tier list of national olympiads :P