coding5.in

ACM国际大学生程序设计竞赛(英文全称:ACM International Collegiate Programming Contest（ACM-ICPC或ICPC）是由美国计算机协会（ACM）主办的

(4,(1,2,3,4))
(5,(1,2,3,4,5))
(6,(1,2,3,4,5,6))
(7,(1,2,3,4,5,6,7))
(8,(1,2,3,4,5,6,7,8))
(10,(1,2,3,4,5,6,7,8,9,10))
(15,(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15))
(20,(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20))
(25,(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,25,24))
(30,(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,30,29))
-1