/in/foo.cc:3:7: error: invalid preprocessing directive #\U00005904\U000074062\U00007684\U000056e0\U00005b50
    3 |     # 处理2的因子
      |       ^~~~~~~~~~~
/in/foo.cc:7:7: error: invalid preprocessing directive #\U00005904\U00007406\U00005947\U00006570\U000056e0\U00005b50
    7 |     # 处理奇数因子
      |       ^~~~~~~~~~~~
/in/foo.cc:1:1: error: 'def' does not name a type
    1 | def prime_factors(x):
      | ^~~
/in/foo.cc:4:5: error: expected unqualified-id before 'while'
    4 |     while x % 2 == 0:
      |     ^~~~~