Educational Codeforces Round 46 (Rated for Div. 2)
http://codeforces.com/contest/1000
A. Codehorses T-shirts
https://blog.csdn.net/Fire_to_cheat_/article/details/81077148
B. Light It Up
https://blog.csdn.net/Fire_to_cheat_/article/details/81077258
C. Covered Points Count
https://blog.csdn.net/Fire_to_cheat_/article/details/81077350
D. Yet Another Problem On a Subsequence
https://blog.csdn.net/Fire_to_cheat_/article/details/81077461
E. We Need More Bosses
https://blog.csdn.net/Fire_to_cheat_/article/details/81077513