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  1. #include<iostream>
  2. using namespace std;
  3. int map[2000][2000],score[2000][2000]={0},test[2000][2000]={0},way[4000000][2];
  4. int main()
  5. {
  6. 	int m,n;
  7. 	cin>>m>>n;
  8. 	int x,y,step,again,fen,max_score=0,cir[2];
  9. 	for(int i=0;i<n;i++)
  10. 	{
  11. 		for(int j=0;j<m;j++) cin>>map[i][j];
  12. 	}//a[y][x]
  13. 	for(int i=0;i<n;i++)
  14. 	{
  15. 		for(int j=0;j<m;j++)
  16. 		{
  17. 			if(test[i][j]!=0) continue;
  18. 			y=i;x=j;
  19. 			test[i][j]=1;
  20. 			step=0;again=0;fen=0;
  21. 			for(;;)
  22. 			{
  23. 				way[step][0]=y;way[step][1]=x;
  24. 				step++;fen++;
  25. 				if(map[y][x]==1) x--;
  26. 				else if(map[y][x]==2) x++;
  27. 				else if(map[y][x]==3) y--;
  28. 				else if(map[y][x]==4) y++;
  29. 				if(x<0||x>=m||y<0||y>=n) break;
  30. 				if(test[y][x]==1&&score[y][x]!=0) {fen+=score[y][x];break;}
  31.     			if(test[y][x]==1&&score[y][x]==0) {cir[0]=y;cir[1]=x;again=1;break;}
  32. 				test[y][x]=1;
  33. 			}
  34. 			if(fen>max_score) max_score=fen;
  35. 			for(int k=0;k<step;k++) score[way[k][0]][way[k][1]]=fen-k;
  36. 			if(again==1)
  37. 			{
  38. 				y=cir[0];x=cir[1];
  39. 				for(;;)
  40. 				{
  41. 					if(map[y][x]==1) x--;
  42. 					else if(map[y][x]==2) x++;
  43. 					else if(map[y][x]==3) y--;
  44. 					else if(map[y][x]==4) y++;
  45. 					if(y==cir[0]&&x==cir[1]) break;
  46. 					score[y][x]=score[cir[0]][cir[1]];
  47. 				}
  48. 			}
  49. 		}
  50. 	}
  51. 	for(int i=0;i<m;i++)
  52. 	{
  53. 		for(int j=0;j<n;j++)
  54. 		{
  55. 			if(score[j][i]==max_score) cout<<i<<" "<<j<<endl;
  56. 		}
  57. 	}
  58. 	return 0;
  59. }
Success #stdin #stdout 0.01s 7580KB
comments (?)
stdin
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4 4
2 2 2 4
4 1 1 4
2 4 2 2
2 4 2 2
stdout
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0 0
2 1
https://ideone.com/Oa5na9
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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