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Grokking Dynamic Programming Patterns for Coding Interviews
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Solution: Longest Repeating Subsequence
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Problem Statement

Given a sequence, find the length of its longest repeating subsequence (LRS). A repeating subsequence will be the one that appears at least twice in the original sequence and is not overlapping (i.e. none of the corresponding characters in the repeating subsequences have the same index).

Example 1:

Input: "t o m o r r o w"
Output: 2

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