Problem B. Travelling Camera Problem 题目连接： http://www.codeforces.com/gym/100253 Description Programming compet…

A. Free Ice Cream 题目连接： http://www.codeforces.com/contest/686/problem/A Description After their adventure with…

F. Magic Matrix 题目连接： http://www.codeforces.com/contest/632/problem/F Description You’re given a matrix …

C. The Smallest String Concatenation 题目连接： http://www.codeforces.com/contest/632/problem/C Description YouR…

A. Ryouko’s Memory Note 题目连接： http://www.codeforces.com/contest/434/problem/A Description Ryouko is an e…

D. Dense Subsequence 题目连接： http://codeforces.com/contest/724/problem/D Description You are given a string s, c…

D. Memory and Scores 题目连接： http://codeforces.com/contest/712/problem/D Description Memory and his friend Lexa …

C. Money Transfers 题目连接： http://www.codeforces.com/contest/675/problem/C Description There are n banks in the …

B. Anton and Classes 题目连接： http://codeforces.com/contest/785/problem/B Description Anton likes to play chess. …

A. Home Numbers 题目连接： http://www.codeforces.com/contest/638/problem/A Description The main street of Berland i…

E. Trains and Statistic 题目连接： http://www.codeforces.com/contest/675/problem/E Description Vasya commutes by tr…

Codeforces Round #177 (Div. 1) A. Polo the Penguin and Strings 题意 让你构造一个长度为n的串，且里面恰好包含k个不同字符，让你构造的字符串字典序最小。 题解…