如何在一行输入中检查两个相同的数字

def check_duplicate_numbers(input_string):
    numbers = list(map(int, input_string.split()))
    seen_numbers = set()
    duplicate_numbers = []
    
    for num in numbers:
        if num in seen_numbers:
            duplicate_numbers.append(num)
        else:
            seen_numbers.add(num)
    
    return duplicate_numbers

input_str = input("请输入一行数字：")
duplicates = check_duplicate_numbers(input_str)
if duplicates:
    print("存在相同的数字:", duplicates)
else:
    print("没有相同的数字")