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Grokking the Coding Interview Patterns in Go

Solution: Append Characters to String to Make Subsequence

Explore how to determine the minimal characters needed to append to a source string so the target becomes its subsequence. Learn the two pointers strategy to efficiently match characters and solve subsequence problems with optimal time and space complexity.

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Statement

You’re given two strings, source and target, made up of lowercase English letters. Your task is to determine the minimum number of characters that must be appended to the end of the source so that the target becomes a subsequence of the resulting string.

Note: A subsequence is formed by deleting zero or more characters from a string without changing the order of the remaining characters.

Constraints:

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