with the length of 3. Notice that the answer must be a substring

LeetCode 3 Longest Substring Without Repeating Characters 반복되는 문자열이 없는 가장 긴 부분 문자열

3. Longest Substring Without Repeating Characters 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 i..