valid-palindrome py3

0125_valid-palindrome/python3/solution.py

@@ -0,0 +1,23 @@
+class Solution:
+    def isPalindrome(self, s: str) -> bool:
+        i = 0
+        j = len(s) - 1
+        
+        while i < j:
+            left = s[i].lower()
+            right = s[j].lower()
+            
+            if not left.isalnum():
+                i += 1
+                continue
+            elif not right.isalnum():
+                j -= 1
+                continue
+            
+            if left != right:
+                return False
+            
+            i += 1
+            j -= 1
+        
+        return True