21. Longest Substring Without Repeating Characters
Given a string s, return the length of its longest substring without repeating characters.
उदाहरण 1:
इनपुट: s = "abcabcbb" आउटपुट: 3
उदाहरण 2:
इनपुट: s = "bbbbb" आउटपुट: 1
सीमाएँ:
0 <= s.length <= 5 * 10^4