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Grokking the Coding Interview Patterns in JavaScript

Solution: Append Characters to String to Make Subsequence

Understand how to determine the minimum number of characters to append to a source string so the target string becomes a subsequence. Explore a greedy two pointers method that matches characters efficiently, ensuring you only add required characters to complete the subsequence. Learn the approach with time and space complexity insights.

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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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