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Published: Sep 11, 2020 License: MIT Imports: 0 Imported by: 0


1044. Longest Duplicate Substring

Given a string S, consider all duplicated substrings: (contiguous) substrings of S that occur 2 or more times. (The occurrences may overlap.)

Return any duplicated substring that has the longest possible length. (If S does not have a duplicated substring, the answer is "".)

Example 1:

Input: "banana"
Output: "ana"

Example 2:

Input: "abcd"
Output: ""


  1. 2 <= S.length <= 10^5
  2. S consists of lowercase English letters.


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