摘要：
Problem Description Every time it rains on Farmer John's fields, a pond forms over Bessie's favorite clover patch. This means that the clover is cover 阅读全文
摘要：
Time Limit: 5000MS Memory Limit: 65536K Total Submissions: 8306 Accepted: 3130 Description Doubleville, a small town in Texas, was attacked by the ali 阅读全文