题意:给定一个n*m的矩阵,然后问你里面存在“girl”和“cat”的数量. 析:很简单么,就是普通搜索DFS,很少量.只要每一个字符对上就好,否则就结束. 代码如下: #include <cstdio> #include <string> #include <cstdlib> #include <cmath> #include <iostream> #include <cstring> #include <set> #i…

原题链接: 大致题意:给你一个二维字符串,可以看成图:再给两个子串“girl”和“cat”,求图中任意起点开始的不间断连接起来的字母构成的两个子串的分别的个数:连接的方向只有不间断的上下左右. 搜索函数: void dfsgirl(int i, int j,int k); //第一层(i1,j1,  k=0)时,k=0表示(i1,j1)上是g,然后枚举四个方位找到i——进入第二层//第二层(i2,j2,   k=1)时,k=1表示(i2,j2)位置上是字母i(并且该位置与i1,j1相邻,这是为什…

As a cute girl, Kotori likes playing ``Hide and Seek'' with cats particularly. Under the influence of Kotori, many girls and cats are playing ``Hide and Seek'' together. Koroti shots a photo. The size of this photo is n×mn×m, each pixel of the photo…

Problem Description These few days, Baby Ming is addicted to playing a matrix game. Given a n∗m matrix, the character ,j∗) (i,j=,,...) are the numbers between −. There are an arithmetic sign (‘+’, ‘-‘, ‘∗’, ‘/’) between every two adjacent numbers, ot…

Problem Description The doggie found a bone in an ancient maze, which fascinated him a lot. However, when he picked it up, the maze began to shake, and the doggie could feel the ground sinking. He realized that the bone was a trap, and he tried despe…

FZU 2107 Hua Rong Dao Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u  Practice  Description Cao Cao was hunted down by thousands of enemy soldiers when he escaped from Hua Rong Dao. Assuming Hua Rong Dao is a narrow aisl…

Board Game Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u  Gym 100935G Description standard input/outputStatements Feras bought to his nephew Saleem a new game to help him learning calculating. The game consists of a boa…

HDU.5692 Snacks ( DFS序 线段树维护最大值 ) 题意分析 给出一颗树,节点标号为0-n,每个节点有一定权值,并且规定0号为根节点.有两种操作:操作一为询问,给出一个节点x,求从0号节点开始到x节点,所能经过的路径的权值最大为多少:操作二为修改,给出一个节点x和值val,将x的权值改为val. 可以看出是树上修改问题.考虑的解题方式有DFS序+线段树,树链剖分,CXTree.由于后两种目前还不会,选择用DFS序来解决. 首先对树求DFS序,在求解过程当中,顺便求解树上前缀和(p…

1008 选数 2002年NOIP全国联赛普及组 时间限制: 1 s 空间限制: 128000 KB 题目等级 : 黄金 Gold 题目描述 Description 已知 n 个整数 x1,x2,…,xn,以及一个整数 k(k<n).从 n 个整数中任选 k 个整数相加,可分别得到一系列的和.例如当 n=4,k＝3,4 个整数分别为 3,7,12,19 时,可得全部的组合与它们的和为: 3+7+12=22 3+7+19＝29 7+12+19＝38 3+12+19＝34. 现在,要求你计算出和为素…

题意:给定 13 张麻将牌,问你是不是“听”牌,如果是输出“听”哪张. 析:这个题,很明显的暴力,就是在原来的基础上再放上一张牌,看看是不是能胡,想法很简单,也比较好实现,结果就是TLE,一直TLE,这不科学啊... 好不容易写出来的,竟然TLE...心痛.就是先确定一个将牌,然后再对刻子和顺子进行分析,其实是要剪枝的,就是在如果有1张或者两张牌,而你又不能构成刻子的时候,就要返回false,因为这就已经没解了. 这一个剪枝,就AC了. 代码如下: #pragma comment(linker,…