B. Vladik and Complicated Book   time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vladik had started reading a complicated book about algorithms containing n pages. To improve understanding…

题目链接:http://codeforces.com/contest/811/problem/D 题意:现在给你一个n*m大小的图,你输出一个方向之后,系统反馈给你一个坐标,表示走完这步之后到的位子,我们需要在2*n*m步之内走到终点,问怎样走才行(多解输出任意一个即可).我们一开始的位子是(1,1),终点位子是“F”,‘*’表示不能走的位子,游戏开始的时候,有一些小伙伴比较调皮,会将U和D互换,就是说假设我们操作了U,但是实际是走到了D.或者也可能将L和R互换,当然也可能都没有互换过,当然也可…

题目链接:http://codeforces.com/contest/811/problem/E 题意:给定一个行数为10 列数10w的矩阵,每个方块是一个整数, 给定l和r 求范围内的联通块数量 所谓联通块即数字相等 题解:显然可以用线段树来维护一下,一共就10行.线段树唯一难处理的就是push_up不好弄,这一要利用一下并查集,因为求的是连通块 的个数.具体看一下代码的注释. #include <iostream> #include <cstdio> #include <…

题目链接:http://codeforces.com/contest/811/problem/C 题意:给你n个数,现在让你选一些区间出来,对于每个区间中的每一种数,全部都要出现在这个区间. 每个区间的价值为该区间不同的数的异或值,现在问你这n个数最大的价值是多少. 题解:一般这种说法的题目都是用dp的,然后显然设dp[i]表示前i个能取得的最大价值,然后再存一下每个数的起始位置和 结束位置然后n*n就可以了,具体看一下代码,挺短的. #include <iostream> #include…

C. Vladik and Memorable Trip   time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vladik often travels by trains. He remembered some of his trips especially well and I would like to tell you…

A. Vladik and Courtesy   time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output At regular competition Vladik and Valera won a and b candies respectively. Vladik offered 1 his candy to Valera. Af…

B. Vladik and Complicated Book time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vladik had started reading a complicated book about algorithms containing n pages. To improve understanding o…

Vladik had started reading a complicated book about algorithms containing n pages. To improve understanding of what is written, his friends advised him to read pages in some order given by permutation P = [p1, p2, ..., pn], where pi denotes the numbe…

离线,树状数组. 数据范围好像有点小,直接暴力可以过的. 我直接上了$n,Q≤100000$的做法:只需要判断区间上比$x$小的数字有几个即可,可以对询问进行离线操作,从左到右一个一个数字插入到树状数组中. #include <iostream> #include <cstdio> #include <cstring> #include <string> #include <algorithm> #include <vector> #…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Vladik is a competitive programmer. This year he is going to win the International Olympiad in Informatics. But it is not as easy as it sounds:…