A. Bus to Udayland 题目连接： http://www.codeforces.com/contest/711/problem/A Description ZS the Coder and Chris th…

D. Friends and Subsequences 题目连接： http://www.codeforces.com/contest/689/problem/D Description Mike and !Mike a…

A. Robbers’ watch 题目连接： http://www.codeforces.com/contest/685/problem/A Description Robbers, who attacke…

B. A Trivial Problem 题目连接： http://www.codeforces.com/contest/633/problem/B Description Mr. Santa asks all the …

Closest Common Ancestors Time Limit: 2000MS   Memory Limit: 10000K Total Submissions: 1337…

Elegant Construction 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=5813 Description Being an ACMer requires …

Clarke and tree 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=5629 Description Clarke is a patient with mult…

ZYB’s Tree Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5593 D…

Sabotage The regime of a small but wealthy dictatorship has been abruptly overthrown by an unexpected rebellio…

B. Batch Sort 题目连接： http://codeforces.com/contest/724/problem/B Description output standard output You are giv…

D. Developing Game 题目连接： http://www.codeforces.com/contest/377/problem/D Description Pavel is going to make a …

Kaka’s Matrix Travels Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6…