Longest Substring Without Repeating Characters
mediumGiven 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 "pwke" is a subsequence, not a substring.
Constraints
0 <= s.length <= 5 * 10^4s consists of English letters, digits, symbols and spaces.
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Test Cases
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