/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:4:20: error: stray '#' in program
    4 | while i * i <= n:  # 只需要检查到sqrt(n)即可
      |                    ^
/in/foo.c:5:24: error: stray '#' in program
    5 |     while n % i == 0:  # 如果i是n的因子
      |                        ^
/in/foo.c:6:34: error: stray '#' in program
    6 |         prime_factors.append(i)  # 添加到素因子列表中
      |                                  ^