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Problem Statement for "EqualSubstrings"

Problem Statement

You will be given a String str consisting of lowercase letters. You will return a String[] containing elements x and y in that order. The returned Strings x and y must satisfy:
  • 1) The string xy (x with y concatenated on the end) must equal str.
  • 2) The number of a's in x must equal the number of b's in y.
  • 3) If multiple solutions are possible, use the one that maximizes the length of x.
See the examples for further clarifications.

Definition

Class:
EqualSubstrings
Method:
getSubstrings
Parameters:
String
Returns:
String[]
Method signature:
String[] getSubstrings(String str)
(be sure your method is public)

Constraints

  • str will contain between 1 and 50 characters inclusive.
  • Each character in str will be a lowercase letter ('a'-'z').

Examples

  1. "aaabbb"

    Returns: { "aaa", "bbb" }

    Here we can split str right down the center.

  2. "bbbaaa"

    Returns: { "bbb", "aaa" }

    Again the center works.

  3. "bbbbbb"

    Returns: { "bbbbbb", "" }

    y can be empty.

  4. "aaaaaa"

    Returns: { "", "aaaaaa" }

    x can be empty.

  5. "abjlkbjalkbjaljsbljbalb"

    Returns: { "abjlkbjalkbjaljs", "bljbalb" }

    Make sure to maximize the length of x.

  6. "cccccccc"

    Returns: { "cccccccc", "" }

  7. "abjabjabjabjabjabjabjabjabjabjabjabjabjabjabjabjab"

    Returns: { "abjabjabjabjabjabjabjabja", "bjabjabjabjabjabjabjabjab" }

  8. "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"

    Returns: { "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz", "" }

  9. "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

    Returns: { "", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" }

  10. "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"

    Returns: { "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb", "" }

  11. "ababababababababababababababababababababababababab"

    Returns: { "ababababababababababababa", "babababababababababababab" }

  12. "jnoidabjasodjbaoibjaobjaiobjoaijbnoijbbn"

    Returns: { "jnoidabjasodjbaoibjaobj", "aiobjoaijbnoijbbn" }

  13. "abjkabjakjbakbjalkbjlaejjebajb"

    Returns: { "abjkabjakjbak", "bjalkbjlaejjebajb" }

  14. "jwoabijobijaoibjaobijeoaibjoia"

    Returns: { "jwoabijobijaoibj", "aobijeoaibjoia" }

  15. "aiowbejowbbjowijboibjweoibjawojb"

    Returns: { "aiowbejowbbjowijboibjweoibj", "awojb" }

  16. "awebwakbkababkabk"

    Returns: { "awebwakbka", "babkabk" }

  17. "greatproblemset"

    Returns: { "greatpro", "blemset" }

  18. "reallyterrific"

    Returns: { "re", "allyterrific" }

  19. "axxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

    Returns: { "", "axxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" }

  20. "axxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxb"

    Returns: { "axxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", "b" }

  21. "a"

    Returns: { "", "a" }

  22. "bbb"

    Returns: { "bbb", "" }

  23. "xxxx"

    Returns: { "xxxx", "" }

  24. "bab"

    Returns: { "ba", "b" }

  25. "fazmlkfmlkfmqzlekjfmlsqdkjfmlsqekjfmzalefkjmldkjb"

    Returns: { "fazmlkfmlkfmqzlekjfmlsqdkjfmlsqekjfmz", "alefkjmldkjb" }

  26. "aaaaaaaa"

    Returns: { "", "aaaaaaaa" }

  27. "sdfsdfsdf"

    Returns: { "sdfsdfsdf", "" }

  28. "aasdfbabb"

    Returns: { "aasdfb", "abb" }

  29. "cccccccc"

    Returns: { "cccccccc", "" }

  30. "abjlkbjalkbjaljsbljbalb"

    Returns: { "abjlkbjalkbjaljs", "bljbalb" }

  31. "ddddddddddddddddddddddddda"

    Returns: { "ddddddddddddddddddddddddd", "a" }

  32. "z"

    Returns: { "z", "" }

  33. "aaaa"

    Returns: { "", "aaaa" }

  34. "fezfzeafcxpvoiuwxcvaazareeaaaaaaaaaaaaaaaaa"

    Returns: { "fezfze", "afcxpvoiuwxcvaazareeaaaaaaaaaaaaaaaaa" }

  35. "zzzzzzssssssssss"

    Returns: { "zzzzzzssssssssss", "" }

  36. "bb"

    Returns: { "bb", "" }

  37. "a"

    Returns: { "", "a" }

  38. "bbb"

    Returns: { "bbb", "" }

  39. "xxxx"

    Returns: { "xxxx", "" }

  40. "bab"

    Returns: { "ba", "b" }

  41. "fazmlkfmlkfmqzlekjfmlsqdkjfmlsqekjfmzalefkjmldkjb"

    Returns: { "fazmlkfmlkfmqzlekjfmlsqdkjfmlsqekjfmz", "alefkjmldkjb" }

  42. "aaaaaaaa"

    Returns: { "", "aaaaaaaa" }

  43. "sdfsdfsdf"

    Returns: { "sdfsdfsdf", "" }

  44. "aasdfbabb"

    Returns: { "aasdfb", "abb" }

  45. "cccccccc"

    Returns: { "cccccccc", "" }

  46. "abjlkbjalkbjaljsbljbalb"

    Returns: { "abjlkbjalkbjaljs", "bljbalb" }

  47. "ddddddddddddddddddddddddda"

    Returns: { "ddddddddddddddddddddddddd", "a" }

  48. "z"

    Returns: { "z", "" }

  49. "aaaa"

    Returns: { "", "aaaa" }

  50. "fezfzeafcxpvoiuwxcvaazareeaaaaaaaaaaaaaaaaa"

    Returns: { "fezfze", "afcxpvoiuwxcvaazareeaaaaaaaaaaaaaaaaa" }

  51. "zzzzzzssssssssss"

    Returns: { "zzzzzzssssssssss", "" }

  52. "bb"

    Returns: { "bb", "" }

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