【2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest H】【观察找规律 脑洞 构造】Tourist Guide 关键点作端点最多路径
H.TouristGuidetimelimitpertest2secondsmemorylimitpertest512megabytesinputstandardinputoutputstandardoutputItisnotthateasytocreateatouristguideasonemightexpect.Agoodtouristguideshouldproperlydistribute