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Grokking the Coding Interview Patterns in Python

Repeated DNA Sequences

Explore how to find all repeated 10-letter DNA sequences within a string by applying the sliding window technique. Understand how to efficiently solve this problem using pattern recognition and optimized substring checks.

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Statement

A DNA sequence consists of nucleotides represented by the letters ‘A’, ‘C’, ‘G’, and ‘T’ only. For example, “ACGAATTCCG” is a valid DNA sequence.

Given a string, s, that represents a DNA sequence, return all the 10-letter-long sequences (continuous substrings of exactly 10 characters) that appear more than once in s. You can return the output in any order.

Constraints:

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