Problem: Append Characters to String to Make Subsequence
Understand how to determine the fewest characters needed to append to a string to make another string its subsequence. Explore the two-pointer technique to efficiently match characters and grasp the solution's linear time and constant space complexity.
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Statement
You are given two strings s and t, both composed entirely of lowercase English letters.
A subsequence of a string is a sequence of characters obtained by deleting zero or more characters from the string without changing the relative order of the remaining characters.
Determine the minimum number of characters that must be appended to the end of s so that t becomes a subsequence of s.
Constraints:
s.length,t.length...