Watch 10 video solutions for Largest Substring Between Two Equal Characters, a easy level problem involving Hash Table, String. This walkthrough by NeetCode has 657,697 views views. Want to try solving it yourself? Practice on FleetCode or read the detailed text solution.
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:
1 <= s.length <= 300s contains only lowercase English letters.