Test instructionsN (2000) points of the tree from which to choose K (50) points to select the point of the medium probability of selecting two points so that the expected value of the two points of the minimum output expected value by k^2Ideas:We will ask the question to simplify sum (sum (DIS))/k^2 * k^2 actually seek sum (sum (dis )) where I and J are arbitrarily selected K points (i,j)Set Dp[i][k] means that the subtree of the root of I is scanned to select the minimum sum of K pointsThen the
Important thing to say three times Kruskal cannot ac Kruskal cannot ac Kruskal impossible ACIf you say you can AC, please hand over your code to try again (the data may be strengthened), and then send me the code, let me open my eyesbegan to write a no optimization of the prim algorithm are tle to die, the pro-matrix can drift over, add a heap optimization may be better, the heart is too tired, has AC has not wanted to change#include Copyright NOTICE: This article for Bo Master original article
N*n Matrix Cost:m in a direction graph, the maximum number of nodes that can be traversed such as a can have 0->1->2->0->1 cost: 2+2+3+2=9#include using namespacestd;intMain () {intn=3;intm=Ten; inta[][3]={{0,2,3},{4,0,2},{3,4,0}}; intlast_step[3]; intdist[3][3]; for(intI=0; i) { for(intj=0; j) {Dist[i][j]=A[j][i]; } } for(intI=0; ii;} intmax=0; for(intstep=1; step-max1; step++){ for(intj=0; j){ intMin=int_max;intu; for(intm=0; m) {
Some observations, reflections and summaries of China's urbanization. It's a good write.Here are some of the ideas in the book:Urbanization is the trend, in 2030 it is expected to have 1 billion people living in the city, the author of the book 2012 years is probably 500 million.The city is not friendly to migrant workers, and many policies treat them as second-class citizens.To give migrant workers equal treatment, to give them more social security, so that they will be willing to spend, so as
Baidu consortium code defects cause dom xss to exist for websites promoted by Baidu (in Tianya, 58 cities, and Ganji as an example)
The http://cpro.baidustatic.com/cpro/ui/c.js file is called with the following code:
Y Y("union/common/logic", [], function() { return {ze: function(e) { (e = e || "") (e = e.replace(/%u[\d|\w]{4}/g, function(e) { return encodeURIComponent(unescape(e)) }));
." Fat water and water. The throat of the Central Plains in Hefei South guard Yangtze River sky insurance (when the battle of crossing the river), the lip teeth of the south of the Yangtze River in the east (control Chaohu near Nanjing), and the central hub of the Xiling barrier (from the Dabie Mountains in the west) (between Hefei and Wuhan), North can enter Xuzhou over Shandong (taierzhuang) near Beijing triangle.
The disadvantage of geographic location: there is no risk around Hefei (similar
The Cities HDU-3371-Connect
Http://acm.hdu.edu.cn/showproblem.php? Pid = 1, 3371
Minimum Spanning Tree. It is known that some nodes are connected.
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income of a man's family is 140.02 million, and the annual income is million (-50)/6 = 15 years. The final conclusion is: male's family creation + the cost of having no food, no drinks, and working for 15 years = the cost of obtaining a wife from Shanghai's upper and middle school! The above is for men's reference only and is generally used by wives in other cities.
[Do you still want to get married if you want to get married ?]
Taking Shenzhen a
Reprint please indicate the source, thank you http://blog.csdn.net/ACM_cxlove? Viewmode = contents by --- cxlove
Question: N cities need to be occupied. M lines are obstacles and P soldiers can use them. Each soldier has a backpack, which can only be replenished once after the city is occupied. Ask the minimum size of the backpack. You can use the P soldiers to complete the task at any starting point.
Http://acm.hdu.edu.cn/showproblem.php? PID = 1, 46
Tip: The following operations can be performed only after the network is connected.1. On the "start" screen, click "weather" with the left mouse button to go to the "weather" application.2. Right-click the blank area on the "weather" application page and choose "location ].4. Click "add to favorites" on the "location" page ].5. On the "Enter location" page, enter the city you want to add to favorites (Beijing is used as a
Label: style blog color Io AR for SP Div Art
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By using DFS, you can set the nodes in the accessible regions to visited = true. In this way, if you perform a few DFS operations on the nodes with visited = false, there will be several unconnected regions, except for an occupied city, the remaining area is the area to be reconnected. The number of areas-1 is the number of roads to be repaired.
Pat 1013 battle over cities
namespacestd;Const intmaxn= ++5;intn,m,k;intCHECK[MAXN];//mark which points are check first, prevent duplicate points from repeating the workintANS[MAXN];//the number of connected branches remaining after deleting node IintVIS[MAXN];//tags for dfs timestructedge{intto ; intNext;} EDGE[MAXN*MAXN];intHEAD[MAXN];inttot;voidinit () {memset (head,-1,sizeof(head)); Tot=0;}voidAddintUintv) {edge[tot].to=v; Edge[tot].next=Head[u]; Head[u]=tot++;}voidDfsintu) {Vis[u]=1; if(head[u]==-1) return; f
Requirement: User input Hebei, then print the city saved by Hebei, the user input city, then show the county of this city in Hebei provinceDIC = { "Hebei": { "Shijiazhuang": ["Luquan","Gaocheng","Yuanshi"], "Handan": ["Yongnian","She County","ci"], }, "Beijing": { "changping":["Shahe","Huilongguan","Lonzeal"], "Haidian":["Zhongguancun","Five crossing","Zhi Chun Lu"] }, "Shanxi": { "Taiyuan":["Qingxu County","Yangqu County","Loufan County"],
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