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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
.
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
{
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