题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1595 find the longest of the shortest Time Limit: 1000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1665    Accepted Submission(s): 588 Problem Description Mari…

Problem Description Marica is very angry with Mirko because he found a new girlfriend and she seeks revenge.Since she doesn't live in the same city, she started preparing for the long journey.We know for every road how many minutes it takes to come f…

题目链接: 点我 题意: 给定一个\(n\)个点,\(m\)条边的带权无向图,起点为\(1\),终点为\(n\),现在可以删去其中的一条边,求一种删边方案使得剩下图的最短路值最大,输出这个最短路的长度. 题目保证删去任意一条边都能使得\(1\)与\(n\)连通,且边权均为正值. 题目分析: 首先用\(Dijkstra\)跑出原图的最短路,由于在最短路之外删边对图的最短路没有影响,所以考虑在最短路上删边,直接暴力跑\(Dijkstra\). 需要注意的是,这里不会超时的原因是一个有\(n\)个点的…

find the longest of the shortest Time Limit: 1000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2524    Accepted Submission(s): 888 Problem Description Marica is very angry with Mirko because he found a new gi…

find the longest of the shortest Time Limit: 1000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1916    Accepted Submission(s): 668 Problem Description Marica is very angry with Mirko because he found a new g…

find the longest of the shortest Time Limit: 1000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2702    Accepted Submission(s): 974 Problem Description Marica is very angry with Mirko because he found a new gi…

http://acm.hdu.edu.cn/showproblem.php?pid=1595 这道题我用spfa在枚举删除边的时候求最短路超时,改用dijkstra就过了. #include <cstdio> #include <queue> #include <cstring> #include <algorithm> #define maxn 1001 using namespace std; <<; int g[maxn][maxn]; i…

转载请注明出处:http://blog.csdn.net/a1dark 分析:经典的次短路问题.dijkstra或者SPFA都能做.先找出最短路.然后依次删掉没条边.为何正确就不证明了.了解思想直接A掉.注意记录路径 #include<stdio.h> #include<string.h> #define INF 0x7ffffff #define N 1010 int mpt[N][N]; int path[N]; int n,m; void init(){ for(int i=…

//给一个无向图,问删除一条边,使得从1到n的最短路最长 //问这个最长路 //这个删除的边必定在最短路上,假设不在.那么走这条最短路肯定比其它短 //枚举删除这条最短路的边,找其最长的即为答案 #include<cstdio> #include<cstring> #include<iostream> using namespace std ; const int maxn = 1110 ; const int inf = 0x3f3f3f3f; struct Edge…

http://acm.hdu.edu.cn/showproblem.php?pid=1595 大致题意: 给一个图.让输出从中删除随意一条边后所得最短路径中最长的. . 思路: 直接枚举每条边想必是不行的.事实上有些边是不须要枚举的,由于删除它们并不影响起点到终点的最短路.起作用的边都是未删边前的最短路径上的边,删除它们最短距离肯定增大,仅仅需在这些最短距离中求最大的就可以. 记录最短路径上的边,仅仅需一个pre数组记录松弛时每一个点的前驱节点. #include <stdio.h> #inc…

find the longest of the shortest Time Limit: 1000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2424    Accepted Submission(s): 846 Problem Description Marica is very angry with Mirko because he found a new gi…

Marica is very angry with Mirko because he found a new girlfriend and she seeks revenge.Since she doesn't live in the same city, she started preparing for the long journey.We know for every road how many minutes it takes to come from one city to anot…

-----------------------------最优化问题------------------------------------- ----------------------常规动态规划  SOJ1162 I-Keyboard  SOJ1685 Chopsticks SOJ1679 Gangsters SOJ2096 Maximum Submatrix  SOJ2111 littleken bg SOJ2142 Cow Exhibition  SOJ2505 The County…

有四种类型: 单源:dij,spfa,bellman-ford 多源:floyd dij有两种: 一个复杂度为n^2,一个复杂度是m*logn 畅通工程续 某省自从实行了很多年的畅通工程计划后,终于修建了很多路.不过路多了也不好,每次要从一个城镇到另一个城镇时,都有许多种道路方案可以选择,而某些方案要比另一些方案行走的距离要短很多.这让行人很困扰. 现在,已知起点和终点,请你计算出要从起点到终点,最短需要行走多少距离. Input本题目包含多组数据,请处理到文件结束. 每组数据第一行包含两个正整…

find the longest of the shortest Time Limit: 1000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2692    Accepted Submission(s): 971 Problem Description Marica is very angry with Mirko because he found a new gi…

Source: Connected Brain Figure above: Bullmore E, Sporns O. Complex brain networks: graph theoretical analysis of structural and functional systems.[J]. Nature Reviews Neuroscience, 2009, 10(3):186-198. Graph measures A graph G consisting of a set of…

转自:http://blog.csdn.net/shahdza/article/details/7779273 最短路 [HDU] 1548 A strange lift基础最短路(或bfs)★2544 最短路 基础最短路★3790 最短路径问题基础最短路★2066 一个人的旅行基础最短路(多源多汇,可以建立超级源点和终点)★2112 HDU Today基础最短路★1874 畅通工程续基础最短路★1217 Arbitrage 货币交换 Floyd (或者 Bellman-Ford 判环)★124…

转自——http://blog.csdn.net/qwe20060514/article/details/8112550 =============================以下是最小生成树+并查集======================================[HDU]1213   How Many Tables   基础并查集★1272   小希的迷宫   基础并查集★1325&&poj1308  Is It A Tree?   基础并查集★1856   More i…

Walking Race   Description flymouse's sister wc is very capable at sports and her favorite event is walking race. Chasing after the championship in an important competition, she comes to a training center to attend a training course. The center has N…

1 多个mp3文件合并成一个mp3文件 一种方法是连接到一起 ffmpeg64.exe -i "concat:123.mp3|124.mp3" -acodec copy output.mp3 解释:-i代表输入参数           contact:123.mp3|124.mp3代表着需要连接到一起的音频文件            -acodec copy output.mp3 重新编码并复制到新文件中 另一种方法是混合到一起 ffmpeg64.exe -i 124.mp3 -i 1…

Walking Race Time Limit: 10000MS   Memory Limit: 131072K Total Submissions: 5409   Accepted: 1371 Case Time Limit: 3000MS Description flymouse’s sister wc is very capable at sports and her favorite event is walking race. Chasing after the championshi…

Walking Race Time Limit: 10000MS   Memory Limit: 131072K Total Submissions: 4123   Accepted: 1029 Case Time Limit: 3000MS Description flymouse’s sister wc is very capable at sports and her favorite event is walking race. Chasing after the championshi…

In this lesson you will learn to talk about languages. 课上内容(Lesson) mother tongue: Chinese official language:  Chinese mandarin Sichuan Dialect Accent Asia  亚洲 亚洲(字源古希腊语:Ασία:拉丁语:Asia),曾译作“亚细亚洲”和“亚西亚洲”,是七大洲中面积最大,人口最多的一个洲.其覆盖地球总面积的8.7%(或占总陆地面积的29.4%).…

1. CTS 时会将 ICG cell 作为 implicit nostop pin 处理,直接穿透,以 ICG cell 后面的 sink 点作为真正的 sink 来长 tree 2. CTS 时会将 generated clock 作为 implicit nonstop pin,直接穿透,以其后面的 sink 点来长 tree:同时会以 generated clock pin 为 start 点,将其自己的 sink pin 长齐 3. 有时候会遇到这样一个问题: clock tree su…

=============================以下是最小生成树+并查集====================================== [HDU] How Many Tables 基础并查集★ 小希的迷宫 基础并查集★ &&poj1308 Is It A Tree? 基础并查集★ More is better 基础并查集★ Constructing Roads 基础最小生成树★ 畅通工程 基础并查集★ 还是畅通工程 基础最小生成树★ 畅通工程 基础最小生成树★ 畅通…

1:连接到一起 'ffmpeg - i "concat:D:\learn\audio\1.aac|D:\learn\audio\2.aac" - acodec copy D:\learn\audio\out.aac' # 推荐用法(Python执行) l1 = ['D:\learn\audio\1.aac', 'D:\learn\audio\2.aac', 'D:\learn\audio\3.aac', 'D:\learn\audio\4.aac'] cmd = ('ffmpeg -i…

命令格式 功能 FFmpeg命令是在ffmpeg.exe可执行文件环境下执行,ffmpeg.exe用于音视频的转码,加水印,去水印,视频剪切,提取音频,提取视频,码率控制等等功能. 最简单的命令 ffmpeg -i input.avi -b:v 640k output.mp4 该命令将当前文件夹下的input.avi文件转换为output.mp4文件,并将output.mp4文件视频的码率设置为640kpbs. 命令格式 ffmpeg -i {输入文件路径} -b:v {输出视频码率} {输出文…

find the longest of the shortest Time Limit: 1000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3990    Accepted Submission(s): 1498 Problem Description Marica is very angry with Mirko because he found a new g…

最近受邀朋友帮忙需要抓取一段某酷电影,偶然间发现ffmpeg程序.说到此可能会有人提到you-get和youtube-dl,期间也接触了该两款程序,但是由于版权原因,该软件仅仅可以抓取前几分钟预览版,作为程序猿F12调试工具我们必不可少的工具,终于发现了新大陆(get.json)期间很多群友以及感兴趣的朋友一直Q我如何做到的,还是那句话授人以鱼不如授人以渔,下面就让我们切入正题领略下ffmpeg的强大. 在开始前我们先了解下ffmpeg,FFmpeg是一套可以用来记录.转换数字音频.视频,并能将…

import java.util.LinkedList; import java.util.Queue; import java.util.Stack; //树中两个节点的最低公共祖先 //第一种情况:只是一颗二叉树,而且还是排序二叉树.思路:从根节点开始找起,如果这两个数一个大于 //根节点,一个小于根节点,那么最低公共子节点就是根节点. //第二种情况:只是一颗普通的树,但是有指向父节点的指针. //那么就变成 了两个链表求第一个公共节点的情况. //第三种情况:只是一个普通的树,而且没有指…