Given a string s, find the length of the longest

substring

without repeating characters.

Example 1:

Input: s = "abcabcbb"Output: 3Explanation: The answer is "abc", with the length of 3.

Example 2:

Input: s = "bbbbb"Output: 1Explanation: The answer is "b", with the length of 1.

Example 3:

Input: s = "pwwkew"Output: 3Explanation: 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:

• 0