A lot of, if not all, of the SGU problems come from old contests, though the SGU problem statements themselves often do not have the contest attribution associated with them. For example, problems 542 through 553 are the 2012 NEERC Southern Subregional, but that attribution is not present in the problem statements (as of the time of this post). Compare this with problems 201 through 208, which are stated as being part of a Petrozavodsk training contest (specifically ASC 2, though that is not explicitly mentioned in the statements).

I'd like to assemble/crowdsource a comprehensive mapping of SGU problem IDs to the contests where the problems were originally hosted, and additionally links to them in the Codeforces gyms if they're hosted there. Does anyone have this mapping? I'm curious if the admins or anyone familiar with how the SGU problems were sourced to begin with can help out here, otherwise this can be easily crowdsourced.

• 193-200: http://codeforces.net/gym/100199 (ASC 1)
• 201-208: http://codeforces.net/gym/100197 (ASC 2)
• 209-217: http://codeforces.net/gym/100198 (ASC 3)
• 296-305: http://codeforces.net/gym/100765 (NEERC Southern Subregional 2006)
• 306-314: http://codeforces.net/gym/101365 (Petr Mitrichev Contest 1)
• 326-335: http://codeforces.net/gym/101366 (Petr Mitrichev Contest 2)
• 346-357: http://codeforces.net/gym/101503 (NEERC Southern Subregional 2007)
• 368-379: http://codeforces.net/gym/101591 (Saratov SU Contest, Summer Petrozavodsk 2008)
• 392-402: http://codeforces.net/gym/101504 (NEERC Southern Subregional 2008)
• 414-422: http://codeforces.net/gym/101367 (Petr Mitrichev Contest 3)
• 423-432: http://codeforces.net/gym/101368 (Petr Mitrichev Contest 4)
• 443-452: http://codeforces.net/gym/100837 (Japanese Contest 3, Summer Petrozavodsk 2009)
• 453-463: http://codeforces.net/gym/101252 (NEERC Southern Subregional 2009)
• 464-473: http://codeforces.net/gym/100206 (Goryinyich Challenge X)
• 474-484: http://codeforces.net/gym/100761 (Halloween Contest 2009, problems A-K only)
• 485-496: http://codeforces.net/gym/101411 (NEERC Western Subregional 2009)
• 497-507: http://codeforces.net/gym/101370 (Petr Mitrichev Contest 5)
• 508-517: http://codeforces.net/gym/101371 (Petr Mitrichev Contest 6)
• 518-529: http://codeforces.net/gym/101246 (NEERC Southern Subregional 2010)
• 530-541: http://codeforces.net/gym/100151 (NEERC Southern Subregional 2011)
• 542-553: http://codeforces.net/gym/100109 (NEERC Southern Subregional 2012)