fcbruce

http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=3795

http://acm.hdu.edu.cn/showproblem.php?pid=2767 Proving Equivalences Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2926    Accepted Sub

http://poj.org/problem?id=2186 Popular Cows Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 23819   Accepted: 9767 Description Every cow's dream

http://poj.org/problem?id=2762 Going from u to v or from v to u? Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 14573   Accepted: 3849 Description