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  1. import java.util.*;
  2.  
  3. class B_Chess {
  4. 	public static void main(String[] args) throws Exception {
  5. 		Scanner s = new Scanner(System.in);
  6. 		String str  = s.next();
  7. 		int rr = str.charAt(0) - 'a';
  8. 		int rc = str.charAt(1) - '1';
  9. 		str = s.next();
  10. 		int nr = str.charAt(0) - 'a';
  11. 		int nc = str.charAt(1) - '1';
  12. 		boolean[][] b = new boolean[8][8];
  13. 		for (int i = 0; i < 8; ++i) {
  14. 			b[rr][i] = true;
  15. 			b[i][rc] = true;
  16. 		}
  17.  
  18. 		for(int[] pos : rook(rr, rc)){
  19. 			b[pos[0]][pos[1]]=true;
  20. 		}
  21. 		for(int[] pos : rook(nr, nc)){
  22. 			b[pos[0]][pos[1]]=true;
  23. 		}
  24. 		int count = 0;
  25. 		for (int i = 0; i < 8; ++i) {
  26. 			for (int j = 0; j < 8; ++j) {
  27. 				if(!b[i][j]){
  28. 					++count;
  29. 				}
  30. 			}
  31. 		}
  32. 		System.out.println(count);
  33. 	}
  34.  
  35. 	static List<int[]> rook(int row, int col) {
  36. 		List<int[]> list = new ArrayList<int[]>();
  37. 		list.add(new int[]{row, col});
  38. 		if (row - 2 >= 0) {
  39. 			if (col + 1 < 8) {
  40. 				list.add(new int[] { row - 2, col + 1 });
  41. 			}
  42. 			if (col - 1 >= 0) {
  43. 				list.add(new int[] { row - 2, col - 1 });
  44. 			}
  45. 		}
  46. 		if (row - 1 >= 0) {
  47. 			if (col + 2 < 8) {
  48. 				list.add(new int[] { row - 1, col + 2 });
  49. 			}
  50. 			if (col - 2 >= 0) {
  51. 				list.add(new int[] { row - 1, col - 2 });
  52. 			}
  53. 		}
  54. 		if (row + 1 < 8) {
  55. 			if (col + 2 < 8) {
  56. 				list.add(new int[] { row + 1, col + 2 });
  57. 			}
  58. 			if (col - 2 >= 0) {
  59. 				list.add(new int[] { row + 1, col - 2 });
  60. 			}
  61. 		}
  62. 		if (row + 2 < 8) {
  63. 			if (col + 1 < 8) {
  64. 				list.add(new int[] { row + 2, col + 1 });
  65. 			}
  66. 			if (col - 1 >= 0) {
  67. 				list.add(new int[] { row + 2, col - 1 });
  68. 			}
  69. 		}
  70. 		return list;
  71. 	}
  72. }
  73.  
Success #stdin #stdout 0.06s 213760KB
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https://ideone.com/bXaK8
language:
Java (HotSpot 12)
created:
15 years ago
visibility:
secret

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