D. Mahmoud and a Dictionary 题目连接： http://codeforces.com/contest/766/problem/D Description Mahmoud wants to wri…

C. Old Berland Language 题目连接： http://www.codeforces.com/contest/37/problem/C Description Berland scientists kn…

Problem H. Password Service 题目连接： http://www.codeforces.com/gym/100253 Description Startups are here, startups…

B. The Same Calendar 题目连接： http://www.codeforces.com/contest/678/problem/B Description The girl Taylor has a b…

B. Game of Robots 题目连接： http://www.codeforces.com/contest/670/problem/B Description In late autumn evening n r…

D. Animals and Puzzle 题目连接： http://codeforces.com/contest/713/problem/D Description Owl Sonya gave a huge lake…

B – Hongcow Solves A Puzzle 题目连接： http://codeforces.com/contest/745/problem/B Description Hongcow likes …

C. Enduring Exodus 题目连接： http://www.codeforces.com/contest/655/problem/C Description In an attempt to escape t…

This cheeseburger you don’t need 题目连接： http://acm.timus.ru/problem.aspx?space=1&num=1993 Description…

E. Frog Fights 题目连接： http://www.codeforces.com/contest/625/problem/E Description stap Bender recently visited …

A. DZY Loves Sequences 题目连接： http://www.codeforces.com/contest/446/problem/A Description DZY has a sequence a,…

B. Dasha and friends 题目连接： http://codeforces.com/contest/761/problem/B Description Running with barriers on th…