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Solution: Repeated DNA Sequences

Explore the sliding window technique to identify repeated 10-letter DNA sequences in a string. Understand how to use hash maps to track substring occurrences efficiently, ensuring you can solve similar problems with a time complexity of O(n). This lesson strengthens your skills in applying fixed-size sliding windows for substring problems.

Statement

A DNA sequence consists of a series of nucleotides, each represented by one of the characters 'A', 'C', 'G', or 'T'.

Given a string s representing a DNA sequence, find and return all 1010-letter-long substrings that appear more than once within s. The result may be returned in any order.

Constraints:

  • 11 \leq s.length 10 ...