Statistics

Problem Statement for "RepeatStringEasy"

Problem Statement

A string S is called a square if there is some string T such that S = T + T. For example, the strings "", aabaab" and "xxxx" are squares, but "a", "aabb" and "aabbaa" are not.

You are given a String s. Find the longest square string that can be obtained from s by erasing some (possibly none, possibly all) of its characters. In other words, we are looking for the longest square that occurs in s as a subsequence. Return the length of that square.

Note that the answer is well-defined, as the square "" (the empty string) will always occur in s as a subsequence.

Definition

Class:
RepeatStringEasy
Method:
maximalLength
Parameters:
String
Returns:
int
Method signature:
int maximalLength(String s)
(be sure your method is public)

Constraints

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

Examples

  1. "frankfurt"

    Returns: 4

    The longest square that occurs in "frankfurt" is "frfr". Its length is 4.

  2. "single"

    Returns: 0

    The letters in the string "single" are all distinct. Hence, the only square that occurs in this string is "". The length of this square is zero.

  3. "singing"

    Returns: 6

  4. "aababbababbabbbbabbabb"

    Returns: 18

  5. "x"

    Returns: 0

  6. "aaaabbababcbbabbabbbcabcbabcabcb"

    Returns: 24

  7. "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

    Returns: 50

  8. "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabaaaaaaaaaaaa"

    Returns: 48

  9. "fjkjsakljflkjakljjfiwoqjfioqwfoiqwjfiojq"

    Returns: 16

  10. "aadgpoachigi"

    Returns: 4

  11. "anjcubddgdgkegaabjmafkheilekfeda"

    Returns: 10

  12. "fjkomincdlqklcaeblckidiadiaynndedeaboffgfbdi"

    Returns: 14

  13. "dgkbbaabeageiaqefepampiffjaf"

    Returns: 10

  14. "ncdkabagambgmrxbyb"

    Returns: 6

  15. "fcah"

    Returns: 0

  16. "adbhbkghadlhsab"

    Returns: 8

  17. "idnefbecgfandfbdjadanebbabguegtaibfbgej"

    Returns: 20

  18. "elcvinkd"

    Returns: 0

  19. "kfkfbntjajgmaeaacahmikkdmfvriftzadddcb"

    Returns: 12

  20. "ccauhegbg"

    Returns: 2

  21. "fdljhcadorufenakncbefvlbqnabdaaijilalraparjcew"

    Returns: 16

  22. "bagackfdfbuqdiddlaahadgbafmfihgpspnqcbkdjha"

    Returns: 16

  23. "hcfhejdnqbjadbbdaocgmejbabdabvdgdhelkcehfmhdbvfa"

    Returns: 18

  24. "fmkjbaclbd"

    Returns: 2

  25. "dfkjabjdiedbmgmeadabdf"

    Returns: 8

  26. "bskcbdagfkhdfaaeabpefkmad"

    Returns: 8

  27. "paadf"

    Returns: 2

  28. "fgtaafekntoa"

    Returns: 6

  29. "xmraaenhpalceckbjpkica"

    Returns: 6

  30. "htilcaddbriqalcgdaibhjqbabadliedbfjfaajeacealdff"

    Returns: 18

  31. "apfhdsbcebaihfajape"

    Returns: 6

  32. "xbhihfbmduqbchgg"

    Returns: 4

  33. "cpaecdceeaegfala"

    Returns: 6

  34. "jcbbninbgnoaadufblfgbdhhrpaqcgoabjliabkcehbdmkc"

    Returns: 16

  35. "ickijfbgibhcbcaeeaehcgsjaulbqbkfqa"

    Returns: 10

  36. "bgbmpdibbjiel"

    Returns: 6

  37. "fhtofaagsbcfabbjicndfbaadphckbdbgefea"

    Returns: 12

  38. "mlefjamfybb"

    Returns: 4

  39. "hftbawfqaxijnaludbknemcjehgcbjpfrqldafcb"

    Returns: 14

  40. "hdigqnfakcljfheodfadcabiidiannuufdbiiqiad"

    Returns: 16

  41. "bdtelnaldgnwjidadadxmhdandddheanbbfqeiblaacbkbme"

    Returns: 16

  42. "azahebdabigasafcasggdfwbmaqajsatdpgzffnuscqdepiavb"

    Returns: 16

  43. "akgcgvaihobdedhkbalj"

    Returns: 4

  44. "cibhcbgffabodabcpckaafafbeubroqdccpgubauf"

    Returns: 16

  45. "jmbaja"

    Returns: 4

  46. "maalkfgabefkdadcafbmahdmhkd"

    Returns: 12

  47. "cdapqgqdhqcna"

    Returns: 4

  48. "aoadeieceibomflhaafgo"

    Returns: 6

  49. "dppkhcoeicalfjdijme"

    Returns: 6

  50. "dhddjicgqflkeqagaodnaananlheagcemvljbafdeascdhjmah"

    Returns: 16

  51. "mhaigddiaebogbkijadfnwaiakacfdbgwcevbtfn"

    Returns: 16

  52. "sajbhtpcefdakehcaabflccacfajggnlbc"

    Returns: 12

  53. "hdchebeakmaceihwvqseabcdbblf"

    Returns: 8

  54. "ljadaldifbejdeixrkfdkceaodaekkoacac"

    Returns: 14

  55. "bmibgaop"

    Returns: 2

  56. "ajjcmaaispljqaadmcckegaaddbadehfjcccpbchnb"

    Returns: 12

  57. "bchccehaqlgfajacfwibsaowbaljcadchbpfhtlifibsfbej"

    Returns: 20

  58. "aoeaf"

    Returns: 2

  59. "kghfudicunjbamjeegjkua"

    Returns: 6

  60. "fbhhbaths"

    Returns: 4

  61. "ngspqbbcildeidbmacgaeecpvdaaabehgwdefinkhbilgil"

    Returns: 14

  62. "aagbfhjeaerwtajmamfdblbnrlhd"

    Returns: 8

  63. "tfedbhebcna"

    Returns: 4

  64. "hahffadadmahakcblcbg"

    Returns: 6

  65. "qjhabhbgrbbamdiaabsj"

    Returns: 6

  66. "ebjbjblcdawijifgfnebecdbgbneabqidqab"

    Returns: 14

  67. "ldiedrhqbanagaeddsalcaadobdfreackjoaetojg"

    Returns: 14

  68. "jbdjeoqhaaailabj"

    Returns: 4

  69. "bjbcmhjfgbaeedielbf"

    Returns: 6

  70. "ibkcnjicbnjjaqbkharoboobhhpcaiahkacfcki"

    Returns: 12

  71. "abeciceaffeknacjbgcordaaagwdgigwnbaeob"

    Returns: 12

  72. "bdaebkgcjdkbalfcxjhdecbrdcbjbfbgbbopaeaoya"

    Returns: 14

  73. "bpcbbjl"

    Returns: 2

  74. "hbtfckfoacdfbkhhlebbmcalibdmcoeikabcl"

    Returns: 14

  75. "fgcaedaabbbhheefuckgbkmgnbdl"

    Returns: 8

  76. "e"

    Returns: 0

  77. "cghvacdaegdfekf"

    Returns: 6

  78. "kk"

    Returns: 2

  79. "eb"

    Returns: 0

  80. "abbsjfapehfdbakocblsaafeatiaamhhechahgkbfdfeilahh"

    Returns: 22

  81. "bpheurflgfiejhagacjff"

    Returns: 6

  82. "qdrhcfiacgrcbebt"

    Returns: 4

  83. "akhxgakabgfakblmclcaeaidaubwknprrqrrwcaajhpvajhkes"

    Returns: 14

  84. "baeeh"

    Returns: 2

  85. "orefkhhtfkbjbwccdfscdkrdgeqagicbabmugtabisg"

    Returns: 10

  86. "cgqbneefsfeanbifigfcdmaoia"

    Returns: 8

  87. "mlgavmkdehmghdagciogudduwghrilrrdaojcjqb"

    Returns: 14

  88. "iheckbetbil"

    Returns: 4

  89. "bsbrgkcbaeeaadcceecheceibumchbanbleadfahbcbwifca"

    Returns: 20

  90. "arfbmffal"

    Returns: 2

  91. "ekvfdgfajlabakagfnfayaqafehajichanbcguacmiipmqcli"

    Returns: 16

  92. "cabucthftrwam"

    Returns: 4

  93. "idrochabq"

    Returns: 0

  94. "jfaj"

    Returns: 2

  95. "abahafercbaafahfhfiibaajadflsanakbfrqpalnkap"

    Returns: 16

  96. "daddbhcakagc"

    Returns: 4

  97. "ma"

    Returns: 0

  98. "ajrhde"

    Returns: 0

  99. "bekcabhcobgabua"

    Returns: 6

  100. "abialbbgharbjiecdafamnbgagddcddaca"

    Returns: 14

  101. "ipsbgmlthraadtqcbtvaaghvbafjhhiatbjaaireikambo"

    Returns: 16

  102. "abaeaskqnmeaudtpsaffchffdhoqealfrcf"

    Returns: 12

  103. "bqefecadecbklcqikebieivemfkfhgbhqdlqo"

    Returns: 12

  104. "chhcbfbcccgbdraadbnajgggfeppsdejhhbibddfgkcarwgbp"

    Returns: 18

  105. "kakkgbgjf"

    Returns: 2

  106. "pcaeaeaemeedbmjbibrkcobcdahlif"

    Returns: 6

  107. "oseejhpkimidbofdfiamiacnjdcb"

    Returns: 12

  108. "hciapnbcbbhtgbkbfmasabjbcdfsditn"

    Returns: 10

  109. "sbfccpjbfaqcbjyacbnffgcbbbehdlljhdppbahchjpdajb"

    Returns: 18

  110. "abccbaabcabcabcabcdabdabcabccccaaabbbabcabcabcaaa"

    Returns: 36

  111. "rrfrurfrur"

    Returns: 8

  112. "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwx"

    Returns: 48

  113. "strvsrt"

    Returns: 4

  114. "saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaad"

    Returns: 48

  115. "aababcbababbabbbbabbabbc"

    Returns: 18

  116. "abccab"

    Returns: 4

  117. "aa"

    Returns: 2

  118. "abcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcd"

    Returns: 48

  119. "adsdasdsadasd"

    Returns: 10

  120. "ababababababaabababababababababababababa"

    Returns: 38

  121. "axbab"

    Returns: 4

  122. "aaaaaabb"

    Returns: 6

  123. "abcdefghijklmnopqrstuaaaabbbcccdddeeebfffffddbssoo"

    Returns: 14

  124. "aaabbabaaabbbabbaabaaabbbabbbaaaabbaaababaabbbabaa"

    Returns: 40

  125. "baab"

    Returns: 2

  126. "bbaa"

    Returns: 2

  127. "aoapaop"

    Returns: 6

  128. "inni"

    Returns: 2

  129. "aaa"

    Returns: 2

  130. "abba"

    Returns: 2

  131. "elle"

    Returns: 2

  132. "abcdefghijklmnopqrstuvwxyywvutsrqpomnlkjihgfedcba"

    Returns: 4

  133. "ababbababbabbbbabbabbababbababbabbbbabbabb"

    Returns: 42

  134. "abcdefghaaa"

    Returns: 4

  135. "qwertyuioplkjhgfdsazcvbnmnbvcxzlkjhgfdsapoiuytrewq"

    Returns: 18

  136. "aabbaa"

    Returns: 4

  137. "waaw"

    Returns: 2

  138. "abcdefghijklmnoprssrponmlkjihgfedcba"

    Returns: 2

  139. "raztxryat"

    Returns: 6

  140. "frrrarrfarr"

    Returns: 8

  141. "abcdefghiabcdjklmnabcdopronmabcdlkjihabcdedcba"

    Returns: 20

  142. "ananannnannandadnadndfsddddssdsdddnsndtttnennddnf"

    Returns: 20

  143. "zxxxxxxxxxxxxxxxxxxxxxxfffffffffffffffffffffffff"

    Returns: 24

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