1 #include <iostream>
 2 #include <cstring>
 3 #include <string>
 4 #include <map>
 5 #include <set>
 6 #include <algorithm>
 7 #include <fstream>
 8 #include <cstdio>
 9 #include <cmath>
10 #include <stack>
11 #include <queue>
12 using namespace std;
13 const double Pi=3.14159265358979323846;
14 typedef long long ll;
15 const int MAXN=5000+5;
16 int dx[4]={-1,1,0,0};
17 int dy[4]={0,0,1,-1};
18 const int INF = 0x3f3f3f3f;
19 const int NINF = 0xc0c0c0c0;
20 const ll mod=1e9+7;
21 int vis[25][25][25];
22 int M[25][25];
23 int m,n;
24 struct node{
25     int x,y,step,k;
26     node (int x=0,int y=0,int step=0,int k=0)
27     {
28         this->x=x;
29         this->y=y;
30         this->step=step;
31         this->k=k;
32     }
33 }tim,now;
34 int bfs(int x,int y,int k)
35 {
36     queue <node> Q;
37     Q.push(node(1,1,0,k));
38     vis[1][1][k]=1;
39     while(!Q.empty())
40     {
41         tim=Q.front();Q.pop();
42         if(tim.x==m&&tim.y==n)
43         {
44             return tim.step;
45         }
46         for(int i=0;i<4;i++)
47         {
48             now.x=dx[i]+tim.x;
49             now.y=dy[i]+tim.y;
50             if(M[now.x][now.y]==1)    now.k=tim.k-1;
51                     else now.k=k;
52             if(now.x>=1&&now.x<=m&&now.y>=1&&now.y<=n&&(M[now.x][now.y]==0||now.k>=0)&&!vis[now.x][now.y][now.k])
53             {
54                 now.step=tim.step+1;
55                 Q.push(now);
56                 //cout << now.x<<" "<< now.y<< " "<< now.step<<endl;
57                 vis[now.x][now.y][now.k]=1;
58             }
59         }
60     }
61     return -1;
62 }
63 int main()
64 {
65     int t;cin>>t;
66     while(t--)
67     {
68         cin>>m>>n;
69         int k;cin>>k;
70         memset(vis,0,sizeof(vis));
71         for(int i=1;i<=m;i++)
72             for(int j=1;j<=n;j++)
73                 cin>>M[i][j];
74         cout <<bfs(1,1,k)<<endl;
75     }
76     return 0;
77 }

 1 #include <iostream>
 2 #include <cstring>
 3 #include <string>
 4 #include <map>
 5 #include <set>
 6 #include <algorithm>
 7 #include <fstream>
 8 #include <cstdio>
 9 #include <cmath>
10 #include <stack>
11 #include <queue>
12 using namespace std;
13 const double Pi=3.14159265358979323846;
14 typedef long long ll;
15 const int MAXN=5000+5;
16 int dx[4]={-1,1,0,0};
17 int dy[4]={0,0,1,-1};
18 const int INF = 0x3f3f3f3f;
19 const int NINF = 0xc0c0c0c0;
20 const ll mod=1e9+7;
21 int m,n;
22 int vis[25][25];
23 int M[25][25];
24 int step[25][25];
25 int ans=INF;
26 int tk;
27 void dfs(int x,int y,int k)
28 {
29     if(x==m&&y==n)
30     {
31         if(ans>step[x][y])
32             ans=step[x][y];
33         return;
34     }
35     for(int i=0;i<4;i++)
36     {
37         int sx=dx[i]+x;
38         int sy=dy[i]+y;
39         if(sx>=1&&sx<=m&&sy>=1&&sy<=n&&!vis[sx][sy]&&(k>0||M[sx][sy]==0))
40         {
41             int pk=k;
42             if(M[sx][sy]==1) pk--;
43                 else pk=tk;
44             vis[sx][sy]=1;
45             step[sx][sy]=step[x][y]+1;
46             dfs(sx,sy,pk);
47             vis[sx][sy]=0;
48         }
49     }
50 }
51 int main()
52 {
53     int t;cin>>t;
54     while(t--)
55     {
56         ans=INF;
57         memset(vis,0,sizeof(vis));
58         memset(step,-1,sizeof(step));
59         cin>>m>>n;cin>>tk;
60         for(int i=1;i<=m;i++)
61             for(int j=1;j<=n;j++)
62                 cin>>M[i][j];
63         step[1][1]=0;
64         vis[1][1]=1;
65         dfs(1,1,tk);
66         if(step[m][n]!=-1) cout <<ans<<endl;
67             else cout <<-1<<endl;
68     }
69     return 0;
70 }