骨牌无非两种放法,横着或竖着放,每次检查最r,c最小的没访问过的点即可.如果不能放就回溯. 最外面加一层认为已经访问过的位置,方便判断. #include<bits/stdc++.h> ; ; ; bool used[MAXB];// used Bone int pip[MAXP][MAXP];// pip 2 Bone ][]; ][]; int cnt; void dfs(int r,int c) { while(ans[r][c]) { ) { r++; c = -; } c++; }…

题意:根据多米诺骨牌的编号的7*8矩阵,每个点可以和相邻的点组成的骨牌对应一个编号,问能形成多少种由编号组成的图. 分析:dfs,组成的图必须有1~28所有编号. #pragma comment(linker, "/STACK:102400000, 102400000") #include<cstdio> #include<cstring> #include<cstdlib> #include<cctype> #include<cm…

211 - The Domino Effect Time limit: 3.000 seconds A standard set of Double Six dominoes contains 28 pieces (called bones) each displaying two numbersfrom 0 (blank) to 6 using dice-like pips. The 28 bones, which are unique, consist of the followingcom…

题目链接: 传送门 Domino Effect time limit per test:1 second     memory limit per test:256 megabytes Description Little Chris knows there's no fun in playing dominoes, he thinks it's too random and doesn't require skill. Instead, he decided to play with the…

Description Did you know that you can use domino bones for other things besides playing Dominoes? Take a number of dominoes and build a row by standing them on end with only a small distance in between. If you do it right, you can tip the first domin…

点我看题目 题意 : 一个新的多米诺骨牌游戏,就是这个多米诺骨中有许多关键牌,他们之间由一行普通的骨牌相连接,当一张关键牌倒下的时候,连接这个关键牌的每一行都会倒下,当倒下的行到达没有倒下的关键牌时,这个关键牌也会倒下,然后与这个关键牌相连接的所有行都会倒下,每一行有两个端点也就是两个关键牌,可以从任意一个端点开始倒下,也可以从两个端点同时开始倒下,从第一张骨牌开始倒,最后倒下的牌的位置以及时间. 思路 : 先利用Dijkstra求出每张关键牌倒下的时间time[i],即求出第一张关键牌到其他关…

Description Did you know that you can use domino bones for other things besides playing Dominoes? Take a number of dominoes and build a row by standing them on end with only a small distance in between. If you do it right, you can tip the first domin…

Problem UVA211-The Domino Effect Accept:536  Submit:2504 Time Limit: 3000 mSec  Problem Description  Input The input file will contain several of problem sets. Each set consists of seven lines of eight integers from 0 through 6, representing an observ…

Domino Effect Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 9335   Accepted: 2325 Description Did you know that you can use domino bones for other things besides playing Dominoes? Take a number of dominoes and build a row by standing t…

Domino Effect Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 10325   Accepted: 2560 Description Did you know that you can use domino bones for other things besides playing Dominoes? Take a number of dominoes and build a row by standing…

Domino Effect Time Limit: 2 Seconds      Memory Limit: 65536 KB Did you know that you can use domino bones for other things besides playing Dominoes? Take a number of dominoes and build a row by standing them on end with only a small distance in betw…

Description Did you know that you can use domino bones for other things besides playing Dominoes? Take a number of dominoes and build a row by standing them on end with only a small distance in between. If you do it right, you can tip the first domin…

Domino Effect Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 12147 Accepted: 3046 Description Did you know that you can use domino bones for other things besides playing Dominoes? Take a number of dominoes and build a row by standing them…

 POJ 1135 -- Domino Effect(单源最短路径) 题目描述: 你知道多米诺骨牌除了用来玩多米诺骨牌游戏外,还有其他用途吗?多米诺骨牌游戏:取一 些多米诺骨牌,竖着排成连续的一行,两张骨牌之间只有很短的空隙.如果排列得很好,当你推 倒第 1张骨牌,会使其他骨牌连续地倒下(这就是短语“多米诺效应”的由来). 然而当骨牌数量很少时,这种玩法就没多大意思了,所以一些人在 80 年代早期开创了另一个 极端的多米诺骨牌游戏:用上百万张不同颜色.不同材料的骨牌拼成一幅复杂的图案.他们开创…

[链接] 我是链接,点我呀:) [题意] 在这里输入题意 [题解] 每次搜素要往下还是要往右摆. 然后维护一下让每个下标只出现一次就可以了. =>作为剪枝条件 [代码] /* 1.Shoud it use long long ? 2.Have you ever test several sample(at least therr) yourself? 3.Can you promise that the solution is right? At least,the main ideal 4.u…

http://uva.onlinejudge.org/external/2/211.html http://uva.onlinejudge.org/external/2/211.pdf 题意:每一种骨牌(Bone) 相应了两个球(Pip). 球的数值从0-6.骨牌从1-28. 然后给你一个包括球数值的矩阵(7*8).问你什么样的骨牌会形成这种球的矩阵. 注意.题目有一个信息没有讲明确,那就是每种骨牌仅仅能取一个,而且要取到全部的28种骨牌.7*8/28 = 2. 思路:对于每种骨牌.先从矩阵中寻…

题目大概是,普通骨牌连接两张关键骨牌,一旦一张关键骨牌倒下与其相邻的普通骨牌也倒下,普通骨牌倒下与其相邻的骨牌也倒下.给出所有有普通骨牌相连的两个关键骨牌之间普通骨牌倒下所需时间,问1号关键骨牌开始倒下后最后一张骨牌倒下的时间和位置. 居然是最短路..记dist[u]为起点骨牌1到关键骨牌u的最短时间,跑个单源最短路可得出.最后倒下的骨牌,有两种情况: 倒下的是关键骨牌u,那么倒下的时间就是dist[u] 倒下的是关键骨牌u和v之间某张普通骨牌,那么倒下的时间就是 (dist[u]+dist[v…

BUPT 2017 Summer Training (for 16) #3G 题意 摆好的多米诺牌中有n个关键牌,两个关键牌之间有边代表它们之间有一排多米诺牌.从1号关键牌开始推倒,问最后倒下的牌在哪里,以及时刻. 题解 注意最后倒下的可能不是关键牌,而是关键牌之间的牌. dfs找出每个关键牌最早到达的时间,也就是它们倒下的时刻.然后再对每条边,计算边上最后倒下的牌的时间. 其实就是跑一遍最短路. 代码 #include <cstdio> #include <cstring> #i…

题目:http://poj.org/problem?id=1135 只是求以1为起点的最短路罢了.稍稍判断一下在边上的情况. 多亏提醒:毒数据——n==1!一定要dis [ k ] >= ans!!! 注意输出格式(换行). #include<iostream> #include<cstdio> #include<cstring> #define ll long long using namespace std; ],xnt,x,y,T; ],cnt,k1,k2;…

题意 分析 这题几乎就是一条dijkstra的问题.但是,如何考虑倒在中间? 要意识到这题求什么:单源最短路的最大值.那么有没有更大的?倒在中间有可能会使它更大. 但是要注意一个问题:不要把不存在的边(边长为inf)算进去:另外,n=1的情况需要注意. 代码 // Origin: // Theme: Graph Theory (Basic) // Date: 080618 // Author: Sam X //#include <bits/stdc++.h> #include <iost…

my english is poor 给你一列全部站立的骨牌,同时向左或向右推其中的几个 保证推得方式为: ...左,右,左,右,左... 即不存在两个相邻的又往相同方向推倒的 刚开始是从左往右一个一个遍历,若第一次推的为往左,将它前面的加起来 再根据 L ,R 判断,累加站立的,还有....太麻烦了 写好程序测试数据正确,提交后WA... 有想到用数组记下站立的个数,但不知如何实现... 百度一下...刚开始看不懂代码..先提交..AC..了 代码如下,注释是我自己的理解 #include<s…

题目链接:http://codeforces.com/contest/405/problem/B 解题报告:一排n个的多米诺骨牌,规定,若从一边推的话多米诺骨牌会一直倒,但是如果从两个方向同时往中间推的话,则最中间的那一块不会倒,其它的都会倒, 具体看图就明白了,输入R表示在该骨牌的位置像右推,输入L表示在该骨牌的位置向左推,输入.表示这个位置没有推,最后让你求,经过那样推之后,还有多少骨牌是没有倒的. 我的做法是从右往左扫一遍,把倒了的标记掉,然后再从右往左扫一遍,把倒了的标记掉,最后计算有多…

Domino Effect Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 8224   Accepted: 2068 Description Did you know that you can use domino bones for other things besides playing Dominoes? Take a number of dominoes and build a row by standing t…

acm之pku题目分类 对ACM有兴趣的同学们可以看看 DP:  1011   NTA                 简单题  1013   Great Equipment     简单题  1024   Calendar Game       简单题  1027   Human Gene Functions   简单题  1037   Gridland            简单题  1052   Algernon s Noxious Emissions 简单题  1409   Commun…

A - Triangles 记忆化搜索呗.搜索以某三角形为顶的最大面积,注意边界情况. #include <stdio.h> #include <cstring> #include <cstdlib> #include <algorithm> #include <cmath> using namespace std; #define lson o<<1 #define rson o<<1|1 #define max(a,b…

That’s where the empathy map comes in. When created correctly, empathy maps serve as the perfect lean user persona: They quickly visualize user needs (especially to non-designers) They fit perfectly into a Lean UX workflow as a starting point for use…

Mathematical Induction Mathematical Induction is a special way of proving things. It has only 2 steps: Step 1. Show it is true for the first one Step 2. Show that if any one is true then the next one is true Then all are true Have you heard of the "D…

题目链接: 传送门 Domino Effect time limit per test:1 second     memory limit per test:256 megabytes Description Little Chris is a huge fan of linear algebra. This time he has been given a homework about the unusual square of a square matrix. The dot product…

最短路经典算法-dijkstra范例(两道),第一道是裸的dijkstra,第二道需要枚举所有边已找到可能的情况. ZOJ2750-Idiomatic Phrases Game 题意:见Code 题解:dijkstra算法需要理解的是松弛操作,这一点掌握好了,其他的代码书写则有点类似于Prim算法,易于掌握. 本题需要记录每一个成语的前4个字符和后4个字符以记录成语的第一个字和最后一个字,博主省略了建图的过程,直接重载了Idiom结构体的“==”运算符,在dijkstra也直接使用了该判断,经过…

ACM训练计划建议 From:freecode#  Date:2015/5/20 前言: 老师要我们整理一份训练计划给下一届的学弟学妹们,整理出来了,费了不少笔墨,就也将它放到博客园上供大家参考. 菜鸟之作,大牛勿喷,如有不当或补充之处,欢迎指出. 本建议书分为三个阶段,大一.大二.大三.大四暂没整理,一方面是大四要面临考验和找工作的问题,坚持继续acm的很少,另一方面,本人还没大四…… 下面以个人经验分析一下这三个阶段建议学习的内容和具体的训练计划. 正文: 大一(第一阶段): 大一是时间最充…