Longest Common Sequence
Detailed guide and Python implementation for the 'Longest Common Sequence' problem.
Problem Statement
Write a function lcs(s1, s2) that returns the length of the longest common subsequence of two strings s1 and s2.
- •0 <= len(s1), len(s2) <= 1000
- •Strings consist of uppercase English letters.
Examples
lcs('ABCDGH', 'AEDFHR')3
The longest common subsequence is 'ADH' which has length 3.
lcs('AGGTAB', 'GXTXAYB')4
The longest common subsequence is 'GTAB' which has length 4.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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