C. Tanya and Toys 题目连接： http://www.codeforces.com/contest/659/problem/C Description In Berland recently a new …

Problem D. Grumpy Cat 题目连接： http://www.codeforces.com/gym/100253 Description This problem is a little bit unus…

C. Fox and Card Game 题目连接： http://codeforces.com/contest/388/problem/C Description Fox Ciel is playing a card …

A. Game With Sticks 题目连接： http://codeforces.com/contest/451/problem/A Description After winning gold and silve…

C. Tic-tac-toe 题目连接： http://www.codeforces.com/contest/3/problem/C Description Certainly, everyone is familiar…

A. Ebony and Ivory 题目连接： http://www.codeforces.com/contest/633/problem/A Description Dante is engaged in a fig…

E. Correct Bracket Sequence Editor 题目连接： http://www.codeforces.com/contest/670/problem/E Description Recently …

A. Plus and Square Root 题目连接： http://codeforces.com/contest/715/problem/A Description ZS the Coder is playing …

B. Little Robber Girl’s Zoo 题目连接： http://www.codeforces.com/contest/686/problem/B Description Little Rob…

E. Mahmoud and a xor trip 题目连接： http://codeforces.com/contest/766/problem/E Description Mahmoud and Ehab live …

D. Messenger 题目连接： http://www.codeforces.com/contest/631/problem/D Description Each employee of the “Bla…

C. Destroying Array 题目连接： http://codeforces.com/contest/722/problem/C Description You are given an array consi…