Create 3-Longest-Substring-Without-Repeating-Characters.py

Author: neetcode-gh

3-Longest-Substring-Without-Repeating-Characters.py

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+class Solution:
+    def lengthOfLongestSubstring(self, s: str) -> int:
+        charSet = set()
+        l = 0
+        res = 0
+        
+        for r in range(len(s)):
+            while s[r] in charSet:
+                charSet.remove(s[l])
+                l += 1
+            charSet.add(s[r])
+            res = max(res, r - l + 1)
+        return res