摘要：
Out of HayTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 11010 Accepted: 4308DescriptionThe cows have run out of hay, a horrible event tha... 阅读全文
摘要：
HighwaysTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 8855 Accepted: 2467 Special JudgeDescriptionThe island nation of Flatopia is perfec... 阅读全文
摘要：
Constructing RoadsTime Limit: 2000MS Memory Limit: 65536KTotal Submissions: 19278 Accepted: 8020DescriptionThere are N villages, which are numbered f... 阅读全文