hdu1035

#include<stdio.h> #include<string.h> int step,n,m; int a[1010][1010]; char map[11][11]; void DFS(int x,int y) { while(x>=0&&y>=0&&x<n&&y<m&&map[x][y]!='O') { if(map[x][y]=='N') { map[x][y]='O'; a[x][y]= step; x--; } else if(map[x][y]=='S') { map[x][y]='O'; a[x][y]= step; x ; } else if(map[x][y]=='E') { map[x][y]='O'; a[x][y]= step; y ; } else if(map[x][y]=='W') { map[x][y]='O'; a[x][y]= step; y--; } } if(map[x][y]=='O') printf("%d step(s) before a loop of %d step(s)n",a[x][y]-1,step 1-a[x][y]); else printf("%d step(s) to exitn",step); } int main() { int i,k,x,y; while(scanf("%d%d%d",&n,&m,&k)!=EOF) { if(n==0||m==0) break; for(i=0;i<n;i ) scanf("%s",map[i]); x=0; y=k-1; step=0; DFS(x,y); } return 0; }