You are given two strings s and t consisting of only lowercase English letters.
Return the minimum number of characters that need to be appended to the end of s so that t becomes a subsequence of s.
A subsequence is a string that can be derived from another string by deleting some or no characters without changing the order of the remaining characters.
\n\n\n
Example 1:
\n\n\nInput: s = "coaching", t = "coding"\nOutput: 4\nExplanation: Append the characters "ding" to the end of s so that s = "coachingding".\nNow, t is a subsequence of s ("coachingding").\nIt can be shown that appending any 3 characters to the end of s will never make t a subsequence.\n\n\nExample 2:
\n\n\nInput: s = "abcde", t = "a"\nOutput: 0\nExplanation: t is already a subsequence of s ("abcde").\n\n\nExample 3:
\n\n\nInput: s = "z", t = "abcde"\nOutput: 5\nExplanation: Append the characters "abcde" to the end of s so that s = "zabcde".\nNow, t is a subsequence of s ("zabcde").\nIt can be shown that appending any 4 characters to the end of s will never make t a subsequence.\n\n\n\n
Constraints:
\n\n1 <= s.length, t.length <= 105s and t consist only of lowercase English letters.Compiled with clang 11 using the latest C++ 20 standard.
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