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Grokking the Coding Interview Patterns in Go

Solution: Append Characters to String to Make Subsequence

Explore how to find the minimum characters to append to a source string to form a target subsequence using a greedy two pointer approach. Understand this efficient technique for matching subsequences and practice implementing this algorithm with O(n) time and O(1) 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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