A – Noldbach problem 题面链接 http://codeforces.com/contest/17/problem/A 题面 Nick is interested in prime numb…

E. Anton and Tree 题目连接： http://codeforces.com/contest/734/problem/E Description Anton is growing a tree in his…

D. Birthday 题目连接： http://www.codeforces.com/contest/623/problem/D Description A MIPT student named Misha has a…

C. Mahmoud and a Message 题目连接： http://codeforces.com/contest/766/problem/C Description Mahmoud wrote a message…

A. Interview 题目连接： http://www.codeforces.com/contest/631/problem/A Description Blake is a CEO of a large compa…

D. Swaps in Permutation 题目连接： http://www.codeforces.com/contest/691/problem/D Description You are given a perm…

D. Mysterious Present 题目连接： http://www.codeforces.com/contest/4/problem/D Description Peter decided to wish ha…

A. Checking the Calendar 题目连接： http://codeforces.com/contest/724/problem/A Description You are given names of …

C. NP-Hard Problem 题目连接： http://www.codeforces.com/contest/688/problem/C Description Recently, Pari and Arya d…

B. Computer Game 题目连接： http://www.codeforces.com/contest/37/problem/B Description Vasya’s elder brother Petya …

C. Alyona and the Tree 题目连接： http://www.codeforces.com/contest/682/problem/C Description Alyona decided to go …

B. Chris and Magic Square 题目连接： http://www.codeforces.com/contest/711/problem/B Description ZS the Coder and C…