superturbofsi的专栏

5A. Chat Server's Outgoing Traffic

5C. Longest Regular Bracket Sequence This is yet another problem dealing with regular bracket sequences. We should remind you that a bracket sequence is called regular, if by inserting «+» and «1»

486B this question is about

set is a very useful tool in python. You can set a set like this:

6B. President's Office This quest

The link to 483B This problem is about binary search. this problem is kind of hard if you don't have knowledge of binary search. If you do, one thing still noising is that how you think about the two

484A. Bits This task is mainly about using |

This task is relatively easy. However, we should notice that the concept of lexicographically larger is hard to comprehend.  So, what is lexicographically larger. 为了便于理解，用中文进行解释，所谓lexicographical

492C is relatively easy. But we should not ignore the exceed time limit problem.  I use heap to complete this task. pop out a element each time. We should notice that it is a bad idea to increase the