drone obstacle course

Topic: Given a bad point of the grid diagram, from point A to point B, the need for a minimum turningNaked SPFA ... It's good to record the direction in the state.Water and water more healthy ~ ~#include Bzoj 1644 Usaco2007 Oct Obstacle Course Obstacle training course SPFA

Question 1644: [usac2007 Oct] obstacle course obstacle training course time limit: 5 sec memory limit: 64 MB Description Consider a square farm consisting of one square of N x n (1 ... B x.. X.... X.. X..... X .. Bessie found herself at point A. She wanted to lick the salt at point B. Slow and clumsy animals, su

1644: [Usaco2007 oct]obstacle Course Obstacle Training session time Limit:5 Sec Memory limit:64 MBsubmit:383 solved:196[Submit] [Status] [Discuss] DescriptionConsider an n x N (1 . . B x.. x x A..... x.. X.... . X. .Bessie found herself exactly at point A, and she wanted to lick salt from the salt block at B. Slow and clumsy animals, such as cows, hate t

) (Find (All (c), (e))! = (c). End ()) - #defineRep (i, n) for (int i = 0; i - #defineTR (c, I) for (ITER (c) i = (c). Begin (); I! = (c). end (); ++i) - Const intN = About; -typedef unsignedLong Longull; in intH, G[n][n], vis[n][n]; - Const intDx[] = {0,0, -1,1}, dy[] = {-1,1,0,0 }; to structNode { + intx, y, S; -Node (inti =0,intj =0,intK =0): X (i), Y (j), S (k) {} theInlineBOOL operatorConstNode a)Const { * returns >A.S; $ }Panax Notoginseng }; -InlinevoidRead () { the Rep (

题目 用优先队列优化普通的广搜就可以过了。 #includeView Code HDU 3152 Obstacle Course（优先队列，广搜）

. OutputEach problem set will be numbered (beginning at one) and will generate a single line giving the problem set and the expense of the minimum-cost path from the top left to the bottom right corner, exactly as shown in the sample output (with only a single space after "Problem" and after the colon). Sample Input 35 5 43 9 13 2 753 7 2 0 12 8 0 9 11 2 1 8 19 8 9 2 03 6 5 1 579 0 5 1 1 5 34 1 2 1 6 5 30 7 6 1 6 8 51 1 7 8 3 2 39 4 0 7 6 4 15 8 3 2 4 8 37 4 8 4 8 3 40Sample Output Problem 1: 20

Hdu 3152 Obstacle Course bfs + priority queue# Include # Include # Include # Include # Include Using namespace std; Const int maxn = 130; Const int inf = 0x7fffffff; Int N; Int dx [4] = {-1, 0, 1, 0 }; Int dy [4] = {0, 1, 0,-1 }; Int line [maxn] [maxn]; Int vis [maxn] [maxn]; Int ans = inf; Struct node {