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我是这样读的(in)In Reply To:有空格没空行 Posted by:ecjtunh at 2006-10-19 20:13:53 #include<stdio.h>
#include<string.h>
const int M=20;
int a[M][M],finish;
struct Point
{
int x,y;
}dir[8]={{0,1},{0,-1},{1,0},{-1,0},{1,1},{1,-1},{-1,1},{-1,-1}};
bool flag[M][M];
int n,m;
void DFS(int x,int y,int color)
{
if (finish) return;
int t;
Point nnd;
for(t=0;t<8;t++)
{
nnd.x=x+dir[t].x;
nnd.y=y+dir[t].y;
if (nnd.x==n && nnd.y==m+1) {finish=1;break;}
if (nnd.x<1 || nnd.x>n || nnd.y<1 || nnd.y>m || !flag[nnd.x][nnd.y] || (a[nnd.x][nnd.y]!=(color+1)%4)) continue;
flag[nnd.x][nnd.y]=false;
DFS(nnd.x,nnd.y,(color+1)%4);
flag[nnd.x][nnd.y]=true;
}
}
int main()
{
int i,j,tst;
char st[M];
tst=0;
while(scanf("%d%d",&n,&m)==2)
{
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
{
scanf("%s",st);
a[i][j]=st[0]-'A';
}
finish=0;
memset(flag,1,sizeof(flag));
DFS(1,0,-1);
printf("Case %d:\n",++tst);
if (finish) printf("Yes!\n");
else printf("No!\n");
}
return 0;
}
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