LeetCode --- 1624. Largest Substring Between Two Equal Characters 解题报告
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Given a string s, return the length of the longest substring between two equal characters, excluding the two characters. If there is no such substring return -1.
A substring is a contiguous sequence of characters within a string.
Example 1:
Input: s = "aa"
Output: 0
Explanation: The optimal substring here is an empty substring between the two \'a\'s.
Example 2:
Input: s = "abca" Output: 2 Explanation: The optimal substring here is "bc".
Example 3:
Input: s = "cbzxy" Output: -1 Explanation: There are no characters that appear twice in s.
Constraints:
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