摘要：
A. Cinema Linetime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputThe new "Die Hard" movie has just been released! There are n people at the cinema bo... 阅读全文
摘要：
树形DP。。。。。Rebuilding RoadsTime Limit: 1000MSMemory Limit: 30000KTotal Submissions: 8188Accepted: 3659DescriptionThe cows have reconstructed Farmer John's farm, with its N barns (1 s的边不需删除，所以-1)#include... 阅读全文