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Grokking the Coding Interview Patterns in C#

Solution: Append Characters to String to Make Subsequence

Explore how to use the two-pointer technique to find the minimum number of characters to append to a source string, making a target string its subsequence. Understand the greedy approach to efficiently match characters and optimize string manipulation in coding interviews.

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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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