Given two strings s and t, return true if s is a subsequence of t, or false otherwise.
A subsequence of a string is a new string that is formed from the original string by deleting some (can be none) of the characters without disturbing the relative positions of the remaining characters. (i.e., "ace" is a subsequence of "abcde" while "aec" is not).
\n
Example 1:
\nInput: s = \"abc\", t = \"ahbgdc\"\nOutput: true\n
Example 2:
\nInput: s = \"axc\", t = \"ahbgdc\"\nOutput: false\n\n
\n
Constraints:
\n\n0 <= s.length <= 1000 <= t.length <= 104s and t consist only of lowercase English letters.\nFollow up: Suppose there are lots of incoming
s, say s1, s2, ..., sk where k >= 109, and you want to check one by one to see if t has its subsequence. In this scenario, how would you change your code?",
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