Problem: Append Characters to String to Make Subsequence
Explore how to determine the minimum number of characters to append to one string so another becomes its subsequence. Learn the two-pointer technique, understand subsequence matching, and implement an efficient O(n + m) time and O(1) space complexity solution.
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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...