Heavy Cargo Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 3768   Accepted: 2013 Description Big Johnsson Trucks Inc. is a company specialized in manufacturing big trucks. Their latest model, the Godzilla V12, is so big that the amount…

最短路变形或最大生成树变形. 问 目标两地之间能通过的小重量. 用最短路把初始赋为INF.其它为0.然后找 dis[v]=min(dis[u], d); 生成树就是把最大生成树找出来.直到出发和终点能沟通的时候,最小的边就是. Kruskal: #include<cstdio> #include<cstring> #include<string> #include<queue> #include<algorithm> #include<ma…

poj 1797 Heavy Transportation Description Background Hugo Heavy is happy. After the breakdown of the Cargolifter project he can now expand business. But he needs a clever man who tells him whether there really is a way from the place his customer has…

-->Frogger 中文翻译 Descriptions: 湖中有n块石头,编号从1到n,有两只青蛙,Bob在1号石头上,Alice在2号石头上,Bob想去看望Alice,但由于水很脏,他想避免游泳,于是跳着去找她.但是Alice的石头超出了他的跳跃范围.因此,Bob使用其他石头作为中间站,通过一系列的小跳跃到达她.两块石头之间的青蛙距离被定义为两块石头之间所有可能路径上的最小必要跳跃距离,某条路径的必要跳跃距离即这条路径中单次跳跃的最远跳跃距离.你的工作是计算Alice和Bob石头之间的青蛙距…

F - Heavy Transportation Time Limit:3000MS     Memory Limit:30000KB     64bit IO Format:%I64d & %I64u Submit Status Practice POJ 1797 Description Background Hugo Heavy is happy. After the breakdown of the Cargolifter project he can now expand busines…

Heavy Transportation Time Limit: 3000MS   Memory Limit: 30000K Total Submissions: 26968   Accepted: 7232 Description Background Hugo Heavy is happy. After the breakdown of the Cargolifter project he can now expand business. But he needs a clever man…

题意:给出m个关系,问你能确定机头牛的排名 思路:要确定排名那必须要把他和其他n-1头牛比过才行,所以Floyd传递闭包,如果赢的+输的有n-1就能确定排名. 代码: #include<cstdio> #include<set> #include<map> #include<cmath> #include<stack> #include<vector> #include<queue> #include<cstring…

好题.这题可以有三种解法:1.Dijkstra   2.优先队列   3.并查集 我这里是优先队列的实现,以后有时间再用另两种方法做做..方法就是每次都选当前节点所连的权值最大的边,然后BFS搜索. 代码: #include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #include <cstdlib> #…

http://poj.org/problem?id=1797 给定n个点,及m条边的最大负载,求顶点1到顶点n的最大载重量. 用Dijkstra算法解之,只是需要把“最短路”的定义稍微改变一下, A到B的路长定义为路径上边权最小的那条边的长度, 而最短路其实是A到B所有路长的最大值. #include<stdio.h> #include<string.h> #include<math.h> #include<stdlib.h> #include<alg…

题面 Background Hugo Heavy is happy. After the breakdown of the Cargolifter project he can now expand business. But he needs a clever man who tells him whether there really is a way from the place his customer has build his giant steel crane to the pla…

Description Background Hugo Heavy is happy. After the breakdown of the Cargolifter project he can now expand business. But he needs a clever man who tells him whether there really is a way from the place his customer has build his giant steel crane t…

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Rotating Scoreboard Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 6420   Accepted: 2550 Description This year, ACM/ICPC World finals will be held in a hall in form of a simple polygon. The coaches and spectators are seated along the ed…

POJ 2376 Cleaning Shifts(轮班打扫) Time Limit: 1000MS   Memory Limit: 65536K [Description] [题目描述] Farmer John is assigning some of his N (1 <= N <= 25,000) cows to do some cleaning chores around the barn. He always wants to have one cow working on clean…

POJ 3253 Fence Repair(修篱笆) Time Limit: 2000MS   Memory Limit: 65536K [Description] [题目描述] Farmer John wants to repair a small length of the fence around the pasture. He measures the fence and finds that he needs N (1 ≤ N ≤ 20,000) planks of wood, eac…

POJ 3126 Prime Path(素数路径) Time Limit: 1000MS    Memory Limit: 65536K Description - 题目描述 The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room numbers on…

 Smallest Difference(最小差) Time Limit: 1000MS    Memory Limit: 65536K Description - 题目描述 Given a number of distinct decimal digits, you can form one integer by choosing a non-empty subset of these digits and writing them in some order. The remaining d…

学习资料: http://www.sikiedu.com/course/37/task/456/show# http://www.sikiedu.com/course/37/task/458/show# 为何要用法线贴图 为了提升模型表现细节而又不增加性能消耗,所以不选择提高模型的面数,而是给模型的材质Shader中使用上法线贴图(Normal Map),通过更改模型上的点的法线方向,增加光影凹凸效果,从而提升模型表现细节.使用法线贴图能使一个三角面(平面)表现出凹凸的视觉效果! 法线贴图原理…

POJ.2251 Dungeon Master (三维BFS) 题意分析 你被困在一个3D地牢中且继续寻找最短路径逃生.地牢由立方体单位构成,立方体中不定会充满岩石.向上下前后左右移动一个单位需要一分钟.你不能对角线移动并且迷宫四周坚石环绕. 若能逃离,则输出逃离需要的最短时间,否则输出Trapped!. 与二维BFS的差别在于,多了一个上下两层.所以除了先后左右移动,还要有上下移动,对于每个位置,总共有6种移动方式,将6种移动方式种可行的每次塞进队列里面就好了. 依旧还要记录歩数.此题没什么大…

poj 2769 感觉♂良好 (单调栈) 比尔正在研发一种关于人类情感的新数学理论.他最近致力于研究一个日子的好坏,如何影响人们对某个时期的回忆. 比尔为人的一天赋予了一个正整数值. 比尔称这个值为当天的情感价值.情感价值越大,日子过的越好.比尔认为,某个时期人的情感,与某一时期的情感价值总和,乘以这一阶段的最小情感价值成正比.这个想法表示,一段时期的好心情可以被糟糕的一天破坏. 现在比尔正在审视自己的生活,并希望找到最有价值的人生阶段.请你帮帮他.由于他过度♂劳累,他的生命天数n<=10000…

1.给定一个连通的无向图G,至少要添加几条边,才能使其变为双连通图. 2.POJ - 3177 Redundant Paths(边双连通分支)(模板)  与这道题一模一样.代码就改了下范围,其他都没动... 3. //边双连通分支 /* 去掉桥,其余的连通分支就是边双连通分支了.一个有桥的连通图要变成边双连通图的话, 把双连通子图收缩为一个点,形成一颗树.需要加的边为(leaf+1)/2(leaf为叶子结点的个数) POJ 3177 给定一个连通的无向图G,至少要添加几条边,才能使其变为双连通图…

poj - 3254 - Corn Fields (状态压缩)超详细 参考了 @外出散步 的博客,在此基础上增加了说明 题意: 农夫有一块地,被划分为m行n列大小相等的格子,其中一些格子是可以放牧的(用1标记),农夫可以在这些格子里放牛,其他格子则不能放牛(用0标记),并且要求不可以使相邻格子都有牛.现在输入数据给出这块地的大小及可否放牧的情况,求该农夫有多少种放牧方案可以选择(注意:任何格子都不放也是一种选择,不要忘记考虑! 思路: 在样例中是一个2×3的表格,我们可以用数字的二进制来枚举每一…

[POJ 1201] Intervals(差分约束系统) 11 1716的升级版 把原本固定的边权改为不固定. Intervals Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 23817   Accepted: 9023 Description You are given n closed, integer intervals [ai, bi] and n integers c1, ..., cn. Write a p…

mybatis(万能map) 我们使用对象作为参数有一个缺点: 我们要在mapper.xml文件和测试中要把所有的字段都写出来,那么,假如一个对象有100个字段,那我们要把这些字段都写出来吗? 所以这时我们就要用到map作为参数 实例: 对象 VS map 接口 int addUser(User user); int addUser2(Map<String,Object> map); mapper.xml <insert id="addUser" parameterT…

题目链接: http://poj.org/problem?id=1797 Background Hugo Heavy is happy. After the breakdown of the Cargolifter project he can now expand business. But he needs a clever man who tells him whether there really is a way from the place his customer has buil…

题目链接 题意:农场有F(1 <= F <= 200)片草地用于放牛,这些草地有P(1 <= P <= 1500)连接,农场的草地上有一些避雨点,奶牛们可以在避雨点避雨,但是避雨点的大小是有限的,所以有的时候需要经过道路去其他避雨点避雨,而经过道路是需要时间的,求出所有奶牛进入避雨点所需要的最小时间,如果不能是所有奶牛进入避雨点,输出-1:每块草地上的奶牛数量范围为(1-1000),草地避雨点的范围为(1--1000)经过道路的时间范围为(1--1000000000) floyd:…

Floyd 最小环模板题 code /* floyd最小环,记录路径,时间复杂度O(n^3) 不能处理负环 */ #include <iostream> #include <cstring> using namespace std; const int INF = 109, maxn = 252645135; int g[INF][INF], dis[INF][INF], pre[INF][INF]; int ans[INF]; //pr[i][j]记录i到j最短路径的第一个点 i…

N (1 ≤ N ≤ 100) cows, conveniently numbered 1..N, are participating in a programming contest. As we all know, some cows code better than others. Each cow has a certain constant skill rating that is unique among the competitors. The contest is conduct…

Friends Time Limit: 2 Seconds      Memory Limit: 65536 KB Alice lives in the country where people like to make friends. The friendship is bidirectional and if any two person have no less thank friends in common, they will become friends in several da…

https://www.luogu.org/problem/P1037 题目描述 给出一个整数 n(n<1030) 和 k 个变换规则(k<=15). 规则: 一位数可变换成另一个一位数:规则的右部不能为零. 例如:n=234.有规则(k＝2): 2-> 5 3-> 6 上面的整数 234 经过变换后可能产生出的整数为(包括原数): 234 534 264 564 共 4 种不同的产生数 问题: 给出一个整数 n 和 k 个规则. 求出: 经过任意次的变换(0次或多次),能产生出多…