越努力，越幸运！！！

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. It means that the supervisor relation forms a tr

Sticks Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 149197   Accepted: 35430 Description George took sticks of the same length and cut them randomly until