/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | n = int(input())
      | ^
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
/in/foo.c:1:5: error: expected expression before 'int'
    1 | n = int(input())
      |     ^~~
/in/foo.c:5:7: error: invalid preprocessing directive #\U000067e5\U0000627e\U0000771f\U000056e0\U00005b50\U00005e76\U00006c42\U0000548c
    5 |     # 查找真因子并求和
      |       ^~~~~~~~~~~~~~~~
/in/foo.c:9:7: error: invalid preprocessing directive #\U000068c0\U000067e5\U0000662f\U00005426\U00004e3a\U00005b8c\U00006570
    9 |     # 检查是否为完数
      |       ^~~~~~~~~~~~~~