g 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") Maxim
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___5___.
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.
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