Solution: Longest Common Subsequence
Explore how to solve the longest common subsequence problem by understanding and applying dynamic programming techniques. This lesson guides you through memoization to optimize recursive solutions, improving efficiency with a 2D table approach and helping you analyze time and space tradeoffs effectively.
Statement
Suppose you are given two strings. You need to find the length of the longest common subsequence between these two strings.
A subsequence is a string formed by removing some characters from the original string while maintaining the relative position of the remaining characters. For example, “abd” is a subsequence of “abcd”, where the removed character is “c”.
If there is no common subsequence, then return 0.
Constraints:
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str1.length