摘要：
Junk-Mail FilterTime Limit: 15000/8000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3547Accepted Submission(s): 1079Problem DescriptionRecognizing junk mails is a tough task. The method used here consists of two steps:1) Extract the common characteristics from the in 阅读全文
摘要：
Cow RelaysTime Limit:1000MSMemory Limit:65536KTotal Submissions:3507Accepted:1388DescriptionFor their physical fitness program,N(2 ≤N≤ 1,000,000) cows have decided to run a relay race using theT(2 ≤T≤ 100) cow trails throughout the pasture.Each trail connects two different intersections (1 ≤I1i≤ 1,0 阅读全文