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…

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…

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…

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. Afte…

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:…

[题目链接]:http://codeforces.com/problemset/problem/743/E [题意] 给你n个数字; 这些数字都是1到8范围内的整数; 然后让你从中选出一个最长的子列; 要求这个子列中各个数字出现的次数的差的绝对值都不超过1; 且如果是相同的数字的话: 都是连在一起的(不会有分散的数字); 问你这个最长的序列的长度是多少; [题解] 二分每个数字至少出现的次数x,(即最少出现x次,当然也可以是x+1次); (单调性是显然的吧,因为如果每个数字出现5次是可行的话,那…

time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output Vladik and Chloe decided to determine who of them is better at math. Vladik claimed that for any positive integer n he can represent fraction as…

A. Vladik and Courtesy 水题略过 #include<cstdio> #include<cstdlib> #include<cmath> using namespace std; typedef long long int LL; int main() { LL a,b; scanf("%I64d%I64d",&a,&b); LL num=1; while(true) { if(a<num){printf(&…

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. Afte…

A. Vladik and Courtesy 题面 At regular competition Vladik and Valera won a and b candies respectively. Vladik offered 1 his candy to Valera. After that Valera gave Vladik 2 his candies, so that no one thought that he was less generous. Vladik for same…

    A CodeForces 811A Vladik and Courtesy   B CodeForces 811B Vladik and Complicated Book   C CodeForces 811C Vladik and Memorable Trip     D CodeForces 811D Vladik and Favorite Game     E CodeForces 811E Vladik and Entertaining Flags 点击题号进入题面 ------…

A. Vladik and Courtesy 2 seconds 256 megabytes   At regular competition Vladik and Valera won a and b candies respectively. Vladik offered 1 his candy to Valera. After that Valera gave Vladik 2 his candies, so that no one thought that he was less gen…

CodeForces - 811A 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 can…

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. Afte…

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. Afte…

Codeforce 811 C. Vladik and Memorable Trip 解析(思維.DP) 今天我們來看看CF811C 題目連結 題目 給你一個數列,一個區段的數列的值是區段內所有相異數的\(XOR\)總和.你可以選任意多的區段,求最大的所有區段的值的總和.然而所有同樣的數字不是完全沒有被包含在區段裡,不然就是要全部在同個區段裡. 前言 這題我一直到看了解答才知道為什麼不是\(O(n)\),題目一直沒搞清楚 @copyright petjelinux 版權所有 觀看更多正版原始文章…

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. Afte…

地址:http://codeforces.com/contest/811/problem/D 题目: D. Vladik and Favorite Game time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output This is an interactive problem. Vladik has favorite game, in…

E. Vladik and cards 题目链接 http://codeforces.com/contest/743/problem/E 题面 Vladik was bored on his way home and decided to play the following game. He took n cards and put them in a row in front of himself. Every card has a positive integer number not e…

C. Vladik and fractions 题目链接 http://codeforces.com/contest/743/problem/C 题面 Vladik and Chloe decided to determine who of them is better at math. Vladik claimed that for any positive integer n he can represent fraction as a sum of three distinct posit…

A. Vladik and flights 题目链接 http://codeforces.com/contest/743/problem/A 题面 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: the question Vladik face now is…

http://codeforces.com/contest/754/problem/C C. Vladik and chat time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Recently Vladik discovered a new entertainment — coding bots for social netwo…

http://codeforces.com/contest/811/problem/C 题意: 给出一行序列,现在要选出一些区间来(不必全部选完),但是相同的数必须出现在同一个区间中,也就是说该数要么不选,选了就必须出现在同一个区间,最后累加区间不同的数的异或值. 思路: 先预处理,求出每个数的左位置和右位置. d[i]表示分析到第 i 位时的最大值. #include<iostream> #include<algorithm> #include<cstring> #i…

codeforces 811E Vladik and Entertaining Flags 题面 \(n*m(1<=n<=10, 1<=m<=1e5)\)的棋盘,每个格子有一个值. 定义联通块:联通块中所有格子的值相等,并且格子四联通. \(1e5\)次询问,每次询问子矩形\((1, l, n, r)\)中联通块的数量. 题解 线段树区间合并. \(cnt[rt]\):区间中联通块个数 \(pre[rt][]\):在区间中用并查集维护端点的连通性.在给合并之后的集合重新编号时,要注…

http://codeforces.com/contest/811/problem/C [题意] 给定一个自然数序列,在这个序列中找出几个不相交段,使得每个段的异或值之和相加最大. 段的异或值这样定义:段中每个不同数字(不重复)相异或. 段有这样的要求:段中任意一个数字不会在段外出现. [思路] 首先预处理每个数字第一次出现和最后一次出现的位置,这样对于一个区间[l,r]就很容易判断是否为满足题意的段. 然后区间DP,dp[i]表示子序列[1,i]的最大值. 状态转移:对于dp[i],最小值为d…

Codeforces Round #384 (Div. 2) 题目链接:Vladik and fractions Vladik and Chloe decided to determine who of them is better at math. Vladik claimed that for any positive integer \(n\) he can represent fraction \(\frac{2}{n}\) as a sum of three distinct posi…

传送门 Description Vladik and Chloe decided to determine who of them is better at math. Vladik claimed that for any positive integer n he can represent fraction   as a sum of three distinct positive fractions in form . Help Vladik with that, i.e for a g…