摘要：
After Farmer John realized that Bessie had installed a "tree-shaped" network among his N (1 <= N <= 10,000) barns at an incredible cost, he sued Bessi 阅读全文
摘要：
Last years Chicago was full of gangster fights and strange murders. The chief of the police got really tired of all these crimes, and decided to arres 阅读全文
摘要：
There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure of employees 阅读全文
摘要：
A school bought the first computer some time ago(so this computer's id is 1). During the recent years the school bought N-1 new computers. Each new co 阅读全文
摘要：
After hearing about the epidemic of obesity in the USA, Farmer John wants his cows to get more exercise, so he has committed to create a bovine marath 阅读全文