F - A Missing Problem in TCPC2017 (SDUT 2018 Autumn Individual Contest - F)
滴答滴答---题目链接WhilethejudgesofTCPCwerebusypreparingtheproblems,theyencounteredastrangeproblem.Oneoftheproblemswasmissing!!ThejudgesrememberthattheypreparedexactlyNproblemsandthattheywerenumberedfrom1toN.