胜利大逃亡--hdu1253

题目链接

http://acm.hdu.edu.cn/showproblem.php?pid=1253

广搜题

 1 #include <stdio.h>
 2 #include <string.h>
 3 #include <queue>
 4 #include <algorithm>
 5 #define inf 0x6ffffff
 6 #define N 55
 7 using namespace std;
 8
 9 int maps[N][N][N],vis[N][N][N];
10
11 int dir[6][3]={ {0,0,1},{0,1,0},{1,0,0},{0,0,-1},{0,-1,0},{-1,0,0} };
12
13 int A,B,C,t;
14
15 struct node
16 {
17     int x,y,z,step;
18 };
19
20 bool judge(int x,int y,int z)
21 {
22     return x<A&&x>=0&&y<B&&y>=0&&z<C&&z>=0&&maps[x][y][z]==0&&vis[x][y][z]==0;
23 }
24
25 int bfs(node s,node e)
26 {
27     queue<node> Q;
28     node q;
29     memset(vis,0,sizeof(vis));
30     vis[s.x][s.y][s.z]=1;
31     Q.push(s);
32     while(!Q.empty())
33     {
34         q=Q.front();
35         Q.pop();
36         if(q.x==e.x&&q.y==e.y&&q.z==e.z && q.step <=t)
37             return q.step;
38
39         if(q.step > t)
40             return -1;
41
42         for(int i=0;i<6;i++)
43         {
44             s.x=q.x+dir[i][0];
45             s.y=q.y+dir[i][1];
46             s.z=q.z+dir[i][2];
47             if(judge(s.x, s.y, s.z))
48             {
49                 vis[s.x][s.y][s.z]=1;
50                 s.step=q.step+1;
51                 Q.push(s);
52             }
53         }
54     }
55     return -1;
56
57 }
58
59 int main()
60 {
61     int T,i,j,k,ans;
62     node s,e;
63     scanf("%d",&T);
64     while(T--)
65     {
66         memset(maps,0,sizeof(maps));
67
68         scanf("%d %d %d %d",&A,&B,&C,&t);
69         for(i=0;i<A;i++)
70         {
71             for(j=0;j<B;j++)
72             {
73                 for(k=0;k<C;k++)
74                 {
75                     scanf("%d",&maps[i][j][k]);
76                 }
77             }
78         }
79         s.x=s.y=s.z=s.step=0;
80         e.x=A-1;e.y=B-1;e.z=C-1;
81
82         ans=bfs(s,e);
83
84         if(A+B+C-3>t)
85             ans=-1;
86         printf("%d\n",ans);
87     }
88     return 0;
89 }