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B. Pair of Toyshttp://codeforces.com/problemset/problem/1023/BTanechka is shopping in the toy shop. There are exactly nn toys in the shop for sale, the cost of the ii-th toy is ii burles. She want...

A. Single Wildcard Pattern Matchinghttp://codeforces.com/problemset/problem/1023/AYou are given two strings ss and tt. The string ss consists of lowercase Latin letters and at most one wildcard ch...

C. Bracket Subsequencehttp://codeforces.com/problemset/problem/1023/CA bracket sequence is a string containing only characters "(" and ")". A regular bracket sequence is a bracket sequence that ca...

B. The Bitshttp://codeforces.com/problemset/problem/1017/BRudolf is on his way to the castle. Before getting into the castle, the security staff asked him a question:Given two binary numbers aa ...

A. The Rankhttp://codeforces.com/problemset/problem/1017/AJohn Smith knows that his son, Thomas Smith, is among the best students in his class and even in his school. After the students of the sch...

G. 打印 LOGOhttps://blog.youkuaiyun.com/sinat_38863494/article/details/79977207time limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard output现在小学生也在学...

 A. Theatre Squaretime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputTheatre Square in the capital city of Berland has a rectangul...

A. Draw!http://codeforces.com/group/HD13CEfWEl/contest/239779/problem/Atime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou sti...

B. Birthdayhttp://codeforces.com/group/HD13CEfWEl/contest/239779/problem/Btime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputCowbo...