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Problem: Append Characters to String to Make Subsequence

Explore how to determine the minimum number of characters needed to append to one string so that another becomes its subsequence. This lesson teaches practical application of the two-pointer technique for string matching and includes time and space complexity analysis, helping you improve problem-solving skills in Go.

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:

  • 11 \leq s.length, t.length 105\leq 10^5 ...