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Grokking the Coding Interview Patterns

Solution: Shortest Common Supersequence

Understand how to compute the shortest common supersequence of two strings by leveraging the longest common subsequence through dynamic programming. Learn to build and backtrack a DP table to reconstruct the shortest sequence that contains both strings as subsequences efficiently.

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Statement

You are given two strings, str1 and str2. Your task is to find the shortest common supersequence (SCS). The shortest possible string that contains both str1 and str2 as subsequences.

If multiple strings satisfy this condition, you may return any one of them.

Note: A string ss is considered a subsequence of another string tt if ss can be obtained by deleting zero or more characters from tt without changing the order ...