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  1. #include <iostream>
  2. #include <math.h>
  3. using namespace std;
  4.  
  5. struct coord
  6. 	{
  7. 		int x,y;
  8. 	};
  9. const int n=8;
  10. int main()
  11. 	{
  12. 		int chessboard[n][n];
  13. 		bool k;
  14. 		string s0,s1;
  15. 		int step=0;
  16. 		coord start, finish;
  17. 		cin>>s0>>s1;
  18. 		start.x=(int)s0[0]-97;
  19. 		start.y=s0[1]-49;
  20. 		finish.x=(int)s1[0]-97;
  21. 		finish.y=s1[1]-49;
  22. 		for(int i=0;i<n;i++)
  23. 			for(int j=0;j<n;j++)
  24. 				chessboard[i][j]=-1;
  25. 		chessboard[start.x][start.y]=0;
  26. 		k=true;
  27. 		while(chessboard[finish.x][finish.y]==-1)
  28. 			{
  29. 				k=false;
  30. 				for(int i=0;i<n;i++)
  31. 					for(int j=0;j<n;j++)
  32. 						if(chessboard[i][j]==step)
  33. 							{
  34. 								for(int a=fmax(0,i-2);a<=fmin(n-1,i+2);a++)
  35. 									for(int b=fmax(0,j-2);b<=fmin(n-1,j+2);b++)
  36. 										if((chessboard[a][b]==-1)&&(((abs(i-a)==2)&&(abs(j-b)==1))||((abs(i-a)==1)&&(abs(j-b)==2))))
  37. 											{
  38.               									chessboard[a][b]=step+1;
  39.               									k=true;
  40. 											}
  41. 							}
  42. 					if(!k) chessboard[finish.x][finish.y]=0;
  43. 					else step++;
  44. 			}
  45. 		if (chessboard[finish.x][finish.y]==0) cout<<"start=finish"<<endl;
  46. 		else
  47. 			{
  48. 				coord path[8];
  49. 				path[0].x=finish.x;
  50. 				path[0].y=finish.y;
  51. 				for(int i=0;i<step;i++)
  52. 					{
  53. 						int x=path[i].x;
  54. 						int y=path[i].y;
  55. 						for(int a=fmax(0,x-2);a<=fmin(n-1,x+2);a++)
  56. 							for(int b=fmax(0,y-2);b<=fmin(n-1,y+2);b++)
  57. 								if((chessboard[a][b]==chessboard[x][y]-1)&&(((abs(x-a)==2)&&(abs(y-b)==1))||((abs(x-a)==1)&&(abs(y-b)==2))))
  58. 									{
  59. 										path[i+1].x=a;
  60. 										path[i+1].y=b;
  61. 									}
  62. 					}
  63. 				for(int i=step;i>=0;i--)
  64. 				cout<<(char)(path[i].x+97)<<path[i].y+1<<endl;
  65. 			}
  66. 		return 0;
  67. 	}
Success #stdin #stdout 0s 3280KB
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https://ideone.com/oNzhnh
A1035 e-olimp 3740
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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