Solution: Append Characters to String to Make Subsequence
Explore the two pointers technique to determine the fewest characters that must be appended to a source string in order to make a target string its subsequence. Learn how to efficiently compare characters in both strings, track matches, and calculate the minimum additions needed. This lesson teaches a greedy algorithm with linear time complexity and constant space usage, helping you solve string subsequence problems effectively.
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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: