longest-substring-without-repeating-characters solution

Author: hyeri0903

longest-substring-without-repeating-characters/hyeri0903.py

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+class Solution:
+    def lengthOfLongestSubstring(self, s: str) -> int:
+        left = 0
+        max_len = 0
+        visited = set()
+
+        for i in range(len(s)):
+            while s[i] in visited:
+                visited.remove(s[left])
+                left += 1
+
+            visited.add(s[i])
+            max_len = max(max_len, i - left + 1)
+        
+        return max_len