bfs disease

; }; Int check (int x, int y) { If (x Return 1; Return 0; } Int judge (int x, int x1, int y, int y1) // conditions that meet the conditions { If (x = x1 y = y1) Return 1; If (x = x1 + 1 y = y1) Return 1; If (x = x1-1 y = y1) Return 1; If (x = x1 y = y1-1) Return 1; If (x = x1 y = y1 + 1) Return 1; Return 0; } Int bfs () { Int I; Queue

."Sample Input7 8#.#####.#.a#. r.#. #x ..... #.##...##...#..............Sample Output13 bfs+ Priority Queue ... the reason that BFS can find the best solution is ... Shorter time points must first access to the first queue ... But because of the presence of guards ... The node that is first accessed is not a shorter node if it is guarded ... So this time we're going to use the priority queue ... Write for t

Topic Link: Find A-toThe topic is not difficult, a few days ago, at that time prepared to write two-way BFS, and then deal with the details of some problems, to catch up with something on hold. Rewrite this evening, no two-way, with two times BFS search, and two-way BFS almost the same principle. It's just a little hole in the problem, you need to be careful.1.Y

Topic Links:http://www.lydsy.com/JudgeOnline/problem.php?id=1295ExercisesFor each point of violence ran BFS, see can reach the farthest position, here if there is an obstacle distance of 1, if there is no obstacle, the distance is 0, with BFS running distance Code:#include #include#include#include#include#includeusing namespacestd;DoubleGet_dis (intXintYintAintb) { returnsqrt1.0* (x-a) * (X-A) +1.0* (y-b

groups involved in the search together. That's, if the original group walks five steps, then splits into both groups each walking three steps, the total distance Is 11=5+3+3.InputOn the first line of input there are one integer, N OutputFor every test case, output one line containing the minimal cost of a succesful search of the maze leaving no aliens alive .Sample Input5##### #A #a### # a# #S ###### #7 7##### #AAA # # # # # # # # # # # #AAA a## Sample Output811The main idea: a figure, in

Title Link: http://poj.org/problem?id=3278Test instructionsOn a number (0 ~ 100000), give you farmer J's position n, and the position of the Bull Cow K, the farmer has three ways of moving: Move left one step (X-1,x is the current position), move right one step (x + 1), move right 2*x step (2 * x), ask the farmer to move at least how many steps can catch up Cows are not moving in situ.Ideas:Since the question is how many steps to move at least, the most easily thought of is violence, assuming th

Getting Started BFS, for the first time, partly borrowed from the great God's#include #include#includeusing namespacestd;inta[5][5];BOOLvisit[5][5];intdx[4]={0,1,0,-1};//Four directions: 0 for right, 1 for lower, 2 for left and 3 for upperintdy[4]={1,0,-1,0};structnode{intx; inty; intS//Path Length intdirec[ -];//Record Direction}node,next;BOOLJudgeintXinty) { if(x0|| X>4|| y0|| Y>4) return true; if(visit[x][y]==true|| a[x][y]==1)

http://www.luogu.org/problem/show?pid=1141To ask questions, the size of the sub-connected block of undirected graphs is sought.Direct BFS, read a search one, over 60;100% points 1,000,000 points, 100,000 queries, is obviously memory.I was weak, and I started out. The number group records the coordinates of the first point of each point belonging to the connected block, and then writes a bunch of them.Later asked a great God, like the mist to see the s

, seconds to reach the Target position, let me show you the Way.1s: (0,0), (1,0) 2s: (1,0), (+) 3s: (+)--(2,1) 4s: (2,1), (2,2) 5s: ( 2,2) (2,3) 6s: (2,3), (1,3) 7s: (1,3), (1,4) 8s:fight at (1,4) 9s:fight at (1,4) 10s: (1,4), (1,5) 11s: (1,5)- > (2,5) 12s: (2,5)--(3,5) 13s: (3,5)--(4,5) 14s:fight at (4,5) Finishgod, our poor hero. FINISHAuthorIgnatius.lIdeas:See the picture to know is search .....Initially want to use DFS because DFS is good to write, but because the shortest path required, DFS

The simple thing to say is the loop inside the BFS ....OJ 1196 ...#include #includestring>#include#include#includeusing namespacestd;intdx[9],dy[9];inttop=0;structww{intX,y,c,v;} q[10000000];intbig[1000002],small[1000002];intf[1001][1001]={};intmap[1001][1001];intMain () {intans=0, bns=0; dx[1]=1; dy[1]=0; dx[2]=1; dy[2]=1; dx[3]=1; dy[3]=-1; dx[4]=0; dy[4]=1; dx[5]=0; dy[5]=-1; dx[6]=-1; dy[6]=0; dx[7]=-1; dy[7]=1; dx[8]=-1; dy[8]=-1; intN; CIN>>N; i

Topic Portal1 /*2 Test instructions: from one count to another, change one number at a time, and each is a prime number3 BFS: First pre-treatment of 1000 to 9999 prime, simple BFS a bit. I didn't output impossible AC, the data was a little weak.4 */5 /************************************************6 Author:running_time7 Created time:2015-8-2 15:46:578 File Name:P oj_3126.cpp9 ******************************

Open a three-dimensional marker array to mark whether Ignatius has reached the position with the key.Since the number of keys is up to 10, you can use state compression to doUse 1 and 0 to indicate that there is no key I, so that this person can get the key state to be used in binary number representationFind the minimum value with BFS#include #include #include #include using namespace Std;const int MAXN = 30;const int inf = 0X7FFFFFFF;int vis[maxn][m

Advertising:#include int main(){ puts("转载请注明出处[vmurder]谢谢"); puts("网址：blog.csdn.net/vmurder/article/details/43970835");}ExercisesBFS 1, 2, n to each point distanceThen enumerate Min{b*f[1]+e*f[2]+p*f[n]};Code:#include #include #include #include #include #define N 50000#define INF 0X3F3F3F3F3F3F3F3FLLusing namespace STD;structksd{intV,next;} e[n1];inthead[n],cnt;inline voidAddintUintV) {e[++cnt].v=v; E[cnt].next=head[u]; head[u]=cnt;}intf[n][3]; Queueint>QvoidBFsintSintP) {Q.push (s), f[

Previously with DFS pruning AC, http://www.cnblogs.com/ediszhao/p/4741825.html, this time with Bfs+priority_queue to try to solve the problemTest instructions: Rescue operations, Angel R has a number of friends a (friends, here is a few times, not see test instructions), Angels are locked in a cell, waiting for friends to save, to save the shortest distance angel.Take the angel as the starting point for BFS

Title: Yes, there are n puddles, with initial water, and amount of water. When the sum of water in a puddle is greater than the amount, the excess water is evenly divided between the puddles connected to the puddle, which is the direction between the puddle and the puddle.The topic is then given the first to add Y water to the X puddle, and finally to query how much water is present in the Z Puddle.Very well understood, mainly is the implementation of BFS