Statistics

Problem Statement for "EightRooks"

Problem Statement

Cat Snuke is playing a puzzle called Eight Rooks Puzzle.

In this puzzle, he must put exactly eight rooks onto an 8x8 chessboard. No two rooks must be in the same row, and no two rooks must be in the same column.

You are given a String[] board. The j-th character of the i-th element of board is either 'R' or '.'. If this is 'R', the cell in row i, column j contains a rook. Otherwise the cell doesn't contain a rook.

Determine whether Snuke solved the puzzle correctly. If he solved the puzzle correctly, return "Correct". Otherwise return "Incorrect".

Definition

Class:
EightRooks
Method:
isCorrect
Parameters:
String[]
Returns:
String
Method signature:
String isCorrect(String[] board)
(be sure your method is public)

Constraints

  • board will contain exactly 8 elements.
  • Each element of board will contain exactly 8 characters.
  • Each character in board will be either 'R' or '.'.

Examples

  1. {"R.......", ".R......", "..R.....", "...R....", "....R...", ".....R..", "......R.", ".......R"}

    Returns: "Correct"

  2. {"........", "....R...", "........", ".R......", "........", "........", "..R.....", "........"}

    Returns: "Incorrect"

    The number of rooks is not eight.

  3. {"......R.", "....R...", "...R....", ".R......", "R.......", ".....R..", "..R.....", ".......R"}

    Returns: "Correct"

  4. {"......R.", "....R...", "...R....", ".R......", "R.......", ".......R", "..R.....", ".......R"}

    Returns: "Incorrect"

    The rightmost column contains two rooks.

  5. {"........", "........", "........", "........", "........", "........", "........", "........"}

    Returns: "Incorrect"

  6. {".....R..", ".R......", "..R.....", "R.......", "....R...", "......R.", ".......R", "...R...."}

    Returns: "Correct"

  7. {"..R.....", "....R...", ".....R..", ".R......", "R.......", "...R....", "......R.", ".......R"}

    Returns: "Correct"

  8. {"..R.....", "...R....", "......R.", "R.......", ".R......", ".....R..", ".......R", "....R..."}

    Returns: "Correct"

  9. {".R......", "......R.", ".......R", ".....R..", "R.......", "..R.....", "...R....", "....R..."}

    Returns: "Correct"

  10. {"....R...", "..R.....", ".R......", "...R....", "R.......", ".....R..", ".......R", "......R."}

    Returns: "Correct"

  11. {".R......", "......R.", "..R.....", ".....R..", "R.......", ".......R", "...R....", "....R..."}

    Returns: "Correct"

  12. {".....R..", "......R.", ".R......", "R.......", "..R.....", ".......R", "....R...", "...R...."}

    Returns: "Correct"

  13. {"...R....", "......R.", ".R......", ".....R..", "..R.....", "....R...", ".......R", "R......."}

    Returns: "Correct"

  14. {"......R.", ".......R", "...R....", "R.......", "....R...", "..R.....", ".R......", ".....R.."}

    Returns: "Correct"

  15. {"...R....", "R.......", ".......R", ".R......", ".....R..", "......R.", "..R.....", "....R..."}

    Returns: "Correct"

  16. {"..R.....", ".......R", "......R.", "....R...", "...R....", "R.......", ".....R..", ".R......"}

    Returns: "Correct"

  17. {".......R", "...R....", "R.......", ".R......", "....R...", "......R.", "..R.....", ".....R.."}

    Returns: "Correct"

  18. {"......R.", "...R....", "..R.....", ".....R..", ".......R", ".R......", "R.......", "....R..."}

    Returns: "Correct"

  19. {".....R..", "..R.....", ".......R", "....R...", "R.......", "...R....", "......R.", ".R......"}

    Returns: "Correct"

  20. {".......R", "...R....", ".R......", ".....R..", "....R...", "..R.....", "......R.", "R......."}

    Returns: "Correct"

  21. {"......R.", ".....R..", "....R...", "..R.....", ".......R", "R.......", "...R....", ".R......"}

    Returns: "Correct"

  22. {"R.......", "..R.....", "......R.", ".....R..", ".R......", ".......R", "...R....", "....R..."}

    Returns: "Correct"

  23. {"R.......", "...R....", "....R...", "..R.....", "......R.", ".....R..", ".R......", ".......R"}

    Returns: "Correct"

  24. {".......R", "......R.", "....R...", "R.......", "..R.....", ".....R..", ".R......", "...R...."}

    Returns: "Correct"

  25. {".R......", "....R...", ".......R", "..R.....", ".....R..", "R.......", "......R.", "...R...."}

    Returns: "Correct"

  26. {".R......", "........", "........", "........", "........", "........", "........", "........"}

    Returns: "Incorrect"

  27. {"........", "........", "........", "........", "R.......", "........", ".......R", "........"}

    Returns: "Incorrect"

  28. {"........", "........", "..R.....", "........", "........", "...R....", ".......R", "R......."}

    Returns: "Incorrect"

  29. {"...RR.R.", "........", "........", "........", "R.......", "..R.R...", "......R.", "....R..."}

    Returns: "Incorrect"

  30. {"........", ".....R.R", ".R...R..", "RRR.....", ".R.R....", "...R....", ".....R.R", "...RRRR."}

    Returns: "Incorrect"

  31. {".R.RRR.R", ".....R.R", "R.R..R.R", "...RRR.R", "R..R.RR.", "R.R...R.", ".R..RR.R", "RRRR.R.R"}

    Returns: "Incorrect"

  32. {"RRRRRRRR", "RRRRRRRR", "RRRRRRRR", "RRRRRRRR", "RRRRRRRR", "RRRRRRRR", "RRRRRRRR", "RRRRRRRR"}

    Returns: "Incorrect"

  33. {"..R.....", "...RR...", ".R......", ".....RR.", ".R......", "........", "........", "....R..."}

    Returns: "Incorrect"

  34. {".RR....R", "..R...R.", "........", "........", "........", ".......R", "RR......", "........"}

    Returns: "Incorrect"

  35. {"..R.....", "R.....R.", "....RR..", "........", "........", ".R....R.", ".......R", "........"}

    Returns: "Incorrect"

  36. {"......R.", ".......R", "..R.....", ".RR....R", "..R.....", "........", "........", ".R......"}

    Returns: "Incorrect"

  37. {"......R.", "R.......", "R...R...", "........", "...R....", "......R.", "..R.....", "....R..."}

    Returns: "Incorrect"

  38. {"........", ".....R..", "....R...", ".RR.RR..", "........", "..R....R", "........", "........"}

    Returns: "Incorrect"

  39. {"...R.R..", "........", "........", "..R.....", "........", ".......R", "R.R.R...", ".....R.."}

    Returns: "Incorrect"

  40. {"..R.....", "....R..R", "........", ".....R.R", "........", "........", "RR...R..", "........"}

    Returns: "Incorrect"

  41. {"R.......", ".......R", "....R...", ".......R", ".R...RR.", "......R.", "........", "........"}

    Returns: "Incorrect"

  42. {"R.......", "......RR", "..R....R", "........", ".....R..", "R.......", "........", "......R."}

    Returns: "Incorrect"

  43. {"........", "..R.....", "....R..R", ".R......", "........", "........", "....RRR.", "......R."}

    Returns: "Incorrect"

  44. {"R.R..R..", "R...R...", "........", "........", "R.......", "....R.R.", "........", "........"}

    Returns: "Incorrect"

  45. {"R..R....", "........", "........", "..R.....", "......R.", "........", ".....R..", "..R.RR.."}

    Returns: "Incorrect"

  46. {"........", "......R.", "RRR.....", "........", "........", ".......R", "R.......", "..R.R..."}

    Returns: "Incorrect"

  47. {".....R.R", ".....RRR", ".......R", "....R...", "........", "........", "........", ".R......"}

    Returns: "Incorrect"

  48. {"...R....", ".....R..", ".....R..", ".R......", "......R.", "....RR..", "........", "...R...."}

    Returns: "Incorrect"

  49. {"........", "R.R.....", ".R..R...", "....R...", "......R.", ".....RR.", "........", "........"}

    Returns: "Incorrect"

  50. {".R......", "..R...RR", "...R....", "........", ".R......", ".......R", "........", "...R...."}

    Returns: "Incorrect"

  51. {".....R.R", "........", "........", ".....R..", "...R..R.", "........", ".....R.R", "....R..."}

    Returns: "Incorrect"

  52. {"....R...", "..R.....", "..R...R.", "...R....", ".....R..", ".....RR.", "........", "........"}

    Returns: "Incorrect"

  53. {"R.......", ".R......", "..R.....", "...R....", "....R...", ".....R..", "......R.", ".......R" }

    Returns: "Correct"

  54. {"........", "....R...", "........", ".R......", "........", "........", "..R.....", "........" }

    Returns: "Incorrect"

  55. {"R.......", ".RR.....", "........", "...R....", "....R...", ".....R..", "......R.", ".......R" }

    Returns: "Incorrect"

  56. {"RRRRRRRR", "........", "........", "........", "........", "........", "........", "........" }

    Returns: "Incorrect"

  57. {".R......", "R.......", "..R.....", "...R....", "....R...", ".....R..", "......R.", ".......R" }

    Returns: "Correct"

  58. {"R.......", "R.......", "R.......", "R.......", "R.......", "R.......", "R.......", "R......." }

    Returns: "Incorrect"

  59. {"R.......", ".R......", "..R.....", "...R....", "....R...", ".....R..", "......RR", ".......R" }

    Returns: "Incorrect"

  60. {"R......R", ".R......", "..R.....", "...R....", "....R...", ".....R..", "......R.", ".......R" }

    Returns: "Incorrect"

  61. {"RR......", ".R......", "..R.....", "...R....", "....R...", ".....R..", "......R.", ".......R" }

    Returns: "Incorrect"

  62. {"........", "........", "........", "........", "........", "........", "........", "........" }

    Returns: "Incorrect"

  63. {"R.......", ".R......", ".RR.....", "...R....", "....R...", ".....R..", "......R.", ".......R" }

    Returns: "Incorrect"

  64. {"RR......", "..R.....", "...R....", "....R...", ".....R..", "......R.", ".......R", "........" }

    Returns: "Incorrect"

  65. {"RR......", "........", "..R.....", "...R....", "....R...", ".....R..", "......R.", ".......R" }

    Returns: "Incorrect"

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