Package g1201_1300.s1239_maximum_length_of_a_concatenated_string_with_unique_characters

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    1239 - Maximum Length of a Concatenated String with Unique Characters.

    Medium

    You are given an array of strings arr. A string s is formed by the concatenation of a subsequence of arr that has unique characters.

    Return the maximum possible length of s.

    A subsequence is an array that can be derived from another array by deleting some or no elements without changing the order of the remaining elements.

    Example 1:

    Input: arr = "un","iq","ue"

    Output: 4

    Explanation: All the valid concatenations are:

    • ""

    • "un"

    • "iq"

    • "ue"

    • "uniq" ("un" + "iq")

    • "ique" ("iq" + "ue")

    Maximum length is 4.

    Example 2:

    Input: arr = "cha","r","act","ers"

    Output: 6

    Explanation: Possible longest valid concatenations are "chaers" ("cha" + "ers") and "acters" ("act" + "ers").

    Example 3:

    Input: arr = "abcdefghijklmnopqrstuvwxyz"

    Output: 26

    Explanation: The only string in arr has all 26 characters.

    Constraints:

    • 1 <= arr.length <= 16

    • 1 <= arr[i].length <= 26

    • arr[i] contains only lowercase English letters.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer maxLength(List<String> arr)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait