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Solution: Append Characters to String to Make Subsequence

Solution: Append Characters to String to Make Subsequence

Let’s solve the Append Characters to String to Make Subsequence problem using the Two Pointers pattern.

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:

  • 11 \leq source.length, target.length 103\leq 10^3 ...