【CROC 2016 - Elimination RoundD】【二分答案orSet】Robot Rapping Results Report 最早多条边出现可以完成唯一拓扑序
RobotRappingResultsReporttimelimitpertest2secondsmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputWhileFarmerJohnrebuildshisfarminanunfamiliarportionofBovinia,Bessieisouttryingsomea