Record A zoj monthly competition

These days are just a few days ago... Yesterday was also pulled by xianbin5 to do the zoj monthly competition http://acm.zju.edu.cn/onlinejudge/showContestProblems.do? Contestid = 340.

This experiences the helplessness of a weak B... the strength of the problem, cannot blame the status... -_-!

A started to think it was a question... Then I thought it would be too much to push DP... Result... I pushed for an hour and didn't launch anything ..! Later I learned that f [I] records the left endpoint of the number pair from I to the right. Fuck!

C. The most frequently asked questions... I didn't see it at the time. I did this morning .... Then, I am confused .... Then, the weak B cannot write a number-like array... Number array + binary...

I pure simulation + and query set .... I naively thought that I wrote and checked the set .. Then contribute n wa... Finally, I found my shit! There is no relationship with and query the set hair!

During the J game, Xianbin ran and said it was a network stream... Today, we can see that it is indeed a network stream, which is the largest stream, but I didn't even have this question... S flow to people, flow to information, flow to T. Note that the traffic from S to m is the number of M information.

K identifies it as DP, but the facts tell us... It uses stack simulation ....

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So many games... I have not summarized three games in total. It is estimated that the recent competition is too concentrated. There is a sense of powerlessness... I can't find it! The last few questions from multiple schools are quite good, but I have not had time to summarize them! It can be used to find the status in normal times, but if you have done a lot of competition, it will be useless. There may be a "surprise "! For example, my status in the past few days is a pleasant surprise... I want to cry ...! I won't play this week. I must summarize several of the previous games! T_t!