[LeetCode] 3. Longest Substring Without Repeating Characters
3. Longest Substring Without Repeating Characters Hardness: \(\color{orange}\textsf{Medium}\) Ralated Topics: Hash Table、String、Sliding Window 一、題目 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. Notice that the answer must be a substring, “pwke” is a subsequence and not a substring. Constraints: ...