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  1.             #include<bits/stdc++.h>
  2. 			using namespace std;
  3. 			#define pb push_back
  4. 			#define mp make_pair
  5. 			#define nline cout<<"\n"
  6. 			#define fast ios_base::sync_with_stdio(false),cin.tie(0)
  7. 			#define ain(A, B, C) assert(IN(A, B, C))
  8. 			#define ull unsigned long long int
  9. 			#define ll long long int
  10. 			#define pii pair<int,int>
  11. 			#define MAXX 1009
  12. 			#define fr(a,b,i) for(int i=a;i<b;i++)
  13. 			vector<int>G[MAXX];
  14. 			char mat[MAXX][MAXX];
  15. 			int n,cnt=0;
  16. 			string s="";
  17. 			string final;
  18. 			void backtrack(int x,int y)
  19. 			{
  20. 				if(x>n-1 or y>n-1 or x<0 or y<0)return ;
  21. 				s+=mat[x][y];
  22. 				if(s.size()==4)
  23. 				{
  24. 					if(s==final)
  25. 					cnt++;
  26. 					return ;
  27. 				}
  28.  
  29. 			   backtrack(x-1,y-1);
  30. 			   backtrack(x+1,y+1);
  31. 			   backtrack(x+1,y-1);
  32. 			   backtrack(x-1,y+1);
  33. 			}
  34. 			int main()
  35. 			{
  36. 				fast;
  37. 				cin>>n;
  38. 				for(int i=0;i<n;i++)
  39. 				 for(int j=0;j<n;j++)
  40. 				   cin>>mat[i][j];
  41. 				cin>>final;
  42. 				backtrack(0,0);   
  43. 				cout<<cnt<<endl;   
  44. 			   return 0;
  45. 			}
  46.  
  47.  
Success #stdin #stdout 0s 4456KB
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https://ideone.com/uvENqu
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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