Codeforces Gym 100725K 题意:给定一个初始全0的序列,然后给\(n\)个查询,每一次调用\(Insert(L_i,i)\),其中\(Insert(L,K)\)表示在第L位插入K,如果第L位已经有值了就会先调用\(Insert(L+1,A_L)\)(其中\(A_L\)表示第L位上的值),再将\(A_L\)赋为K.问经过查询后序列的模样. 思路:首先将题意抽象成每次找到从第L位开始第一个0,并将其"拖"回第L位,然后将其更改为K.这个操作很明显可以用FHQ Treap…

转载请注明出处:http://www.cnblogs.com/Delostik/p/3553114.html 目前已有[A B C D E] 例行吐槽:趴桌子上睡着了 [A. Genetic Engineering] http://codeforces.com/contest/391/problem/A 问最少插入几个字符,使得字符串不存在连续偶数个相同字母.不说什么 #include <iostream> #include <string> using namespace std…

Portal --> Increasing Costs Description 给你一个\(n\)个点无重边无自环的无向连通图,每条边有一个边权,对于每一条边,询问去掉这条边之后有多少个点到\(1\)号点的最短路会发生改变 Solution 会用到一个叫做灭绝树的东西(这个名字好霸气qwq) ​ 其实不算是什么特别高大上的玩意:灭绝树其实就是一个点灭绝后它的子树内的所有点都灭绝 ​ 然后所谓的"灭绝"其实可以理解为..满足什么条件之类的,在不同的题目中有所不同(比如说在这题里面就…

对比着关系型数据库,我们对redis key的设计一般有以下两种格式: 表名:主键名:主键值:列名 表名:主键值:列名 在所有主键名都是id的情况下(其实我个人不喜欢这种情况,比如user表,它的主键名就应该是user_id,而不是id,这样在表与表之间关联的时候一目了然) 用冒号作为分割是设计key的一种不成文的原则,遵循这种格式设计出的key在某些redis客户端下可以有效的识别: 但是,在关系型数据中,除主键外,还有可能根据其他列来查询. 如上表中, username 也是极频繁查询的,往…

time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output Polycarp has interviewed Oleg and has written the interview down without punctuation marks and spaces to save time. Thus, the interview is now a…

time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output Galya is playing one-dimensional Sea Battle on a 1 × n grid. In this game a ships are placed on the grid. Each of the ships consists of b consecu…

time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output Vasya is currently at a car rental service, and he wants to reach cinema. The film he has bought a ticket for starts in t minutes. There is a str…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Famous Brazil city Rio de Janeiro holds a tennis tournament and Ostap Bender doesn't want to miss this event. There will be n players participat…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Mr. Funt now lives in a country with a very specific tax laws. The total income of mr. Funt during this year is equal to n (n ≥ 2) burles and th…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Local authorities have heard a lot about combinatorial abilities of Ostap Bender so they decided to ask his help in the question of urbanization…