There are some problems with timeline of rating after last contest (Codeforces Round #643 (Div. 2)). This affected a small part of the participants (I only looked for the first places). For some reasons, the beginning is 1970 now.
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It's funny that the rating can break through the right wall and appear on the left.
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UPD. Thx for very fast fixing, Mike!
two words: time travel
I would like to know how much participants where born before participation in that contest.
Yeah,happened to me also. Now its fine :).