Negative rating

Правка en1, от RMSZ005, 2017-04-17 00:20:46

Hello, I'm new to the codeforces platform. I participated in the Codeforces Round #408 (Div. 2) a,d i solved 0 problems (3508 rank), yet i became green (pupil) and i got 1370 as rating. Today i participated in Codeforces Round #409 (rated, Div. 2, based on VK Cup 2017 Round 2) and i solved 2 problems (2088 rank) yet i got negative rating (-65). I'm wondering why?

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en1 Английский RMSZ005 2017-04-17 00:20:46 380 Initial revision (published)