LONGEST SUBSTRING WITHOUT REPEATING CHARACTERS - Brute force -- Optimal + Code (JAVA)

#slidingwindowalgorithm #longestsubstringwithoutrepeatingcharacter #stringsinjava #codinginterviewquestions Given a string s, find the length of the longest substring without repeating characters. Example 1: Input: s = "abcabcbb" Output: 3 Explanation: The answer is "abc", with the length of 3. Example 2: Input: s = "bbbbb" Output: 1 Explanation: The answer is "b", with the length of 1. Example 3: Input: s = "pwwkew" Output: 3 Explanation: The answer is "wke", with the length of 3.

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