转载请注明出处:http://blog.csdn.net/u012860063? viewmode=contents 题目链接:http://codeforces.com/problemset/problem/445/A DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the chessboard are bad, oth…

A. DZY Loves Chessboard time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the c…

DescriptionDZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the chessboard are bad, others are good. For every good cell, DZY wants to put a chessman on it. Each chessman is either white…

先上题目: A. DZY Loves Chessboard time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of…

DZY Loves Chessboard time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the ches…

A. DZY Loves Chessboard time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the c…

A. DZY Loves Chessboard time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the c…

A. DZY Loves Chessboard time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the c…

A. DZY Loves Chessboard time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the c…

题目链接: http://codeforces.com/problemset/problem/445/A 题解: 这道题是在现场赛的最后一分钟通过的,相当惊险,而且做的过程也很曲折. 先是用递推,结果发现递推下去可能会出现非法的情况(一开始还不知道,坚定不移地认为这种方法是对的.Now,what can I say?) 然后用回溯,就是类似在递推的方式下,如果遇到非法就退回上一步,有了改错的机会.结果,超时.也是,这种方法太暴力了. 最后想到:一个格子的与之相邻的格子(如果能涂色),其颜色必定不…

DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the chessboard are bad, others are good. For every good cell, DZY wants to put a chessman on it. Each chessman is either white or black. A…

B. DZY Loves FFT time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves Fast Fourier Transformation, and he enjoys using it. Fast Fourier Transformation is an algorithm used to calculate…

题目链接: 传送门 DZY Loves Chemistry time limit per test1 second     memory limit per test256 megabytes Description DZY loves Physics, and he enjoys calculating density. Almost everything has density, even a graph. We define the density of a non-directed gr…

题目链接: 传送门 DZY Loves Chemistry time limit per test:1 second     memory limit per test:256 megabytes Description DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will react. He wants to pour these chemicals…

A. DZY Loves Physics time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves Physics, and he enjoys calculating density. Almost everything has density, even a graph. We define the density…

DZY loves colors, and he enjoys painting. On a colorful day, DZY gets a colorful ribbon, which consists of n units (they are numbered from 1 to n from left to right). The color of thei-th unit of the ribbon is i at first. It is colorful enough, but w…

A. DZY Loves Hash time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY has a hash table with p buckets, numbered from 0 to p - 1. He wants to insert n numbers, in the order they are given, i…

B. DZY Loves Chemistry time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will react. He wants to…

A. DZY Loves Hash time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY has a hash table with p buckets, numbered from 0 to p - 1. He wants to insert n numbers, in the order they are given, i…

B. DZY Loves Strings time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves collecting special strings which only contain lowercase letters. For each lowercase letter c DZY knows its val…

对于这题本人刚开始的时候觉得应该用DFS来解决实现这个问题,但由于本人对于DFS并不是太熟,所以就放弃了这个想法: 但又想了想要按照这个要求实现问题则必须是黑白相间,然后把是字符是'B'或'W'改为'-',即可: 下面贴一下我的代码吧 #include<cstdio> #include<cstring> #include<algorithm> #define N 100+10 using namespace std; char maze[N][N]; char str[…

先生成nXm的BW棋盘 BWBWBWBW WBWBWBWB BWBWBWBW WBWBWBWB 类似上面交替变换 然后将输入为’-’的地方替换成‘-’即可 #include <iostream> #include <vector> #include <algorithm> #include <string> using namespace std; int main(){ int n,m; cin >> n >>m; vector&l…

题意:给出n*m的棋盘,在‘.’处放上B或者W,最后要求所有的B和W都不相邻 先把棋盘的点转化成‘B’,再搜,如果它的四周存在‘B’,则将它变成'W' 一直挂在第五个数据的原因是,没有dfs(nx,ny) 搜索果断弱爆了= =(差不多写了一个小时) #include<iostream> #include<cstdio> #include<cstring> #include <cmath> #include<stack> #include<v…

链接:http://codeforces.com/contest/445/problem/A 描述:一个n*m的棋盘,有一些格子不能放棋子.现在把黑白棋子往上放,要求放满且相邻格子的棋子颜色不同.输出一种可行解. 思路:脑筋急转弯... 下过国际象棋的都知道,棋盘本身可以染色成为黑白相间的格子,毁掉其中的格子后也不会影响其2-SAT的性质.直接输出再加一个判断当前格子是否能放棋子就可以了. 我的实现: 1 #include <iostream> 2 #include <cstdio>…

DZY Loves Chessboard time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the ches…

[BZOJ3309]DZY Loves Math Description 对于正整数n,定义f(n)为n所含质因子的最大幂指数.例如f(1960)=f(2^3 * 5^1 * 7^2)=3, f(10007)=1, f(1)=0.给定正整数a,b,求sigma(sigma(f(gcd(i,j)))) (i=1..a, j=1..b). Input 第一行一个数T,表示询问数.接下来T行,每行两个数a,b,表示一个询问. Output 对于每一个询问,输出一行一个非负整数作为回答. Sample…

[BZOJ3563/3569]DZY Loves Chinese II Description 神校XJ之学霸兮,Dzy皇考曰JC. 摄提贞于孟陬兮,惟庚寅Dzy以降. 纷Dzy既有此内美兮,又重之以修能. 遂降临于OI界,欲以神力而凌♂辱众生. 今Dzy有一魞歄图,其上有N座祭坛,又有M条膴蠁边. 时而Dzy狂WA而怒发冲冠,神力外溢,遂有K条膴蠁边灰飞烟灭. 而后俟其日A50题则又令其复原.(可视为立即复原) 然若有祭坛无法相互到达,Dzy之神力便会大减,于是欲知其是否连通. Input 第…

学长小清新题表之UOJ 14.DZY Loves Graph 题目描述 \(DZY\)开始有 \(n\) 个点,现在他对这 \(n\) 个点进行了 \(m\) 次操作,对于第 \(i\) 个操作(从 \(1\)开始编号)有可能的三种情况: \(Add\ a\ b:\) 表示在 \(a\) 与 \(b\) 之间连了一条长度为 \(i\)的边(注意,\(i\)是操作编号).保证 \(1≤a,b≤n\). \(Delete\ k:\) 表示删除了当前图中边权最大的\(k\)条边.保证$ k$一定不会比…

DZY Loves Chemistry time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will react. He wants to pou…

题目地址:http://codeforces.com/contest/447/problem/C C. DZY Loves Sequences time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY has a sequence a, consisting of n integers. We'll call a sequence…