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  1. /*
  2.       *** PATIENCE ABOVE PERFECTION ***
  3.         "When in doubt, use brute force. :D"
  4. */
  5. #include<bits/stdc++.h>
  6. using namespace std;
  7. #define pb push_back
  8. #define mp make_pair
  9. #define nline cout<<"\n"
  10. #define fast ios_base::sync_with_stdio(false),cin.tie(0)
  11. #define ull unsigned long long int
  12. #define ll long long int
  13. #define pii pair<int,int>
  14. #define MAXX 55
  15. #define fr(a,b,i) for(int i=a;i<b;i++)
  16. vector<int>G[MAXX];
  17. int X[]={1,1,0,-1,-1,-1,0,1};
  18. int Y[]={0,1,1,1,0,0,-1,-1,-1};
  19. int d=0,h,w;
  20. char ch[MAXX][MAXX];
  21. bool vis[MAXX][MAXX];
  22. int maxx=-1;
  23. struct data
  24. {
  25. 	int x,y;
  26. 	void set(int _x,int _y)
  27. 	{
  28. 		x=_x;
  29. 		y=_y;
  30. 	}
  31. };
  32. void dfs(data src,int d)
  33. {
  34. 	vis[src.x][src.y]=true;
  35. 	for(int i=0;i<8;i++)
  36. 	{  
  37. 	   int xx=X[i]+src.x;
  38. 	   int yy=Y[i]+src.y;
  39. 		if(xx>=0 and xx<w and yy>=0 and yy<h and (not vis[xx][yy]) and ((char)(ch[src.x][src.y]+1))==ch[xx][yy])
  40. 	   {  
  41. 	   	data x;
  42. 	   	x.set(xx,yy);
  43. 	   	dfs(x,++d);
  44. 	   }
  45. 	} 
  46. 	maxx=max(maxx,d);
  47. }
  48. int main()
  49. {  
  50.    cin>>h>>w;
  51.    int final=1;
  52. 	while(h!=0 and w!=0)
  53. 	{
  54. 		fr(0,h,i)
  55. 		 fr(0,w,j)
  56. 		   cin>>ch[i][j];
  57.      data point;
  58.      vector<data>v;
  59.      fr(0,h,i)
  60.       {
  61. 		 fr(0,w,j)
  62.        {
  63.        	if(ch[i][j]=='A')
  64.       	{
  65.       	point.set(i,j);
  66.       	v.pb(point);
  67.          }
  68.        }
  69.      }
  70.      maxx=0;
  71.      int f=0;
  72.      for(int i=0;i<v.size();i++)
  73.      {
  74.      	 memset(vis,false,sizeof vis);
  75.      	 dfs(v[i],0);
  76.  
  77.      }
  78.      //cout<<v.size()<<endl;
  79.      if(not v.empty())
  80.      printf("Case %d: %d",final++,maxx+1);
  81.      else
  82.      printf("Case %d: %d",final++,0);
  83.      nline;
  84.      cin>>h>>w;
  85. 	}
  86.    return 0;
  87. }
  88.  
Success #stdin #stdout 0s 3104KB
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https://ideone.com/sOVAnv
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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