1 #include "stdio.h"
2 #include <iostream>
3 using namespace std;
4 #include "string.h"
5 #include "stdlib.h"
6 int num[1001][1001];
7 typedef struct Lnode
8 {
9 int value;
10 Lnode *next;
11 };
12
13 int main()
14 {
15 int n,i,j,k;
16 int sum=0,temp,loc;
17 int m;
18 int sx,sy,ex,ey;
19 while(scanf("%d%d",&m,&n)!=EOF)
20 {
21 if (n<1||m<1)
22 {
23 continue;
24 }
25 for (i=0;i<m;i++)
26 {
27 for(j=0;j<n;j++)
28 {
29 scanf("%d",&num[i][j]);
30 }
31 }
32 sx=sy=0;
33 ex=sx+n-1;
34 ey=sy+m-1;
35
36
37 while(sx<=ex&&sy<=ey)
38 {
39
40 for (i=sx;i<=ex;i++)
41 {
42 printf("%d ",num[sy][i]);
43 }
44 for (i=sy+1;i<=ey;i++)
45 {
46 printf("%d ",num[i][ex]);
47 }
48 if(ey-sy>0) //1,2
49 {
50 for (i=ex-1;i>=sx;i--)
51 {
52 printf("%d ",num[ey][i]);
53 }
54 }
55 if(ex-sx>0) //1
56 for (i=ey-1;i>=sy+1;i--) //2
57 {
58 printf("%d ",num[i][sx]);
59 }
60 sx++;
61 sy++;
62 ex--;
63 ey--;
64 }
65 printf("\n");
66 }
67
68 return 0;
69 }