Solution: Append Characters to String to Make Subsequence
Explore how to determine the least number of characters to append to a source string so that a target string becomes its subsequence. Understand the two-pointer greedy algorithm that compares characters in both strings, advancing pointers to minimize additions. This lesson helps you apply this efficient strategy for problems involving subsequences.
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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: