Codeforces Round #204 (Div. 2) C. Jeff and Rounding
C.JeffandRoundingtimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputJeffgot 2n realnumbers a1, a2, ..., a2n asabirthdaypresent.Theboyhatesnon-integernumbers,soh