@huashengdou

def remove_duplicates(s: str) -> str: result = "" # Initialize an empty string to store the characters after removing duplicates for char in s: # Iterate through each character in the string if char not in result: # If the character is not already in the result string result += char # Add the character to the result string return result # Return the string after removing duplicates # Test print(remove_duplicates("abcabcbb")) # Output: "abc"

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