Solution: Longest Common Subsequence
Explore the solution to the longest common subsequence problem by understanding and implementing a dynamic programming approach. Learn to optimize the naive recursive method using memoization with a 2D table to efficiently compute the subsequence length, improving both time and space complexity.
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