You are given a 0-indexed string s that consists of digits from 0 to 9.
A string t is called a semi-repetitive if there is at most one consecutive pair of the same digits inside t. For example, 0010, 002020, 0123, 2002, and 54944 are semi-repetitive while 00101022, and 1101234883 are not.
Return the length of the longest semi-repetitive substring inside s.
A substring is a contiguous non-empty sequence of characters within a string.
\n\n\n
Example 1:
\n\n\nInput: s = "52233"\nOutput: 4\nExplanation: The longest semi-repetitive substring is "5223", which starts at i = 0 and ends at j = 3. \n\n\n
Example 2:
\n\n\nInput: s = "5494"\nOutput: 4\nExplanation: s is a semi-reptitive string, so the answer is 4.\n\n\n
Example 3:
\n\n\nInput: s = "1111111"\nOutput: 2\nExplanation: The longest semi-repetitive substring is "11", which starts at i = 0 and ends at j = 1.\n\n\n
\n
Constraints:
\n\n1 <= s.length <= 50'0' <= s[i] <= '9'Compiled with clang 11 using the latest C++ 17 standard.
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