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 问题概述：有n个比赛队，编号为从1到n，比赛结束后，裁判委员会要将所有参赛队伍从前往后依次排名，但现在 裁判委员会不能直接获得每个队的比赛成绩，只知道每场比赛的结果，即P1赢P2(用P1 P2表示)这种，排名时P1在 必须在P2之前，现在请你编程序确定排名(答案不止一种，按照队伍从小到大排列) 输入样例：                                  对应输出：

灯塔(LightHouse) Description As shown in the following figure, If another lighthouse is in gray area, they can beacon each other. For example, in following figure, (B, R) is a pair of lig

旅行商(TSP) Description Shrek is a postman working in the mountain, whose routine work is sending mail to n villages. Unfortunately, road between villages is out of repair for long time, such

D. Robot Vacuum Cleanertime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputPushok the dog has been chasing Imp for a few hours already.Fortunately, Imp...

E. Turn Off The TVtime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputLuba needs your help again! Luba has n TV sets. She knows that i-th TV set will ...