/in/foo.c:6:2: error: unknown type name 'def'
    6 | }def main():
      |  ^~~
/in/foo.c:6:6: error: redefinition of 'main'
    6 | }def main():
      |      ^~~~
/in/foo.c:3:5: note: previous definition of 'main' with type 'int()'
    3 | int main()
      |     ^~~~
/in/foo.c: In function 'main':
/in/foo.c:6:12: error: expected declaration specifiers before ':' token
    6 | }def main():
      |            ^
/in/foo.c:7:10: error: invalid preprocessing directive #\U00008bfb\U000053d6\U00008f93\U00005165\U0000ff0c\U00005047\U00008bbe\U00004e09\U00004e2a\U00006570\U00004ee5\U00007a7a\U0000683c\U00005206\U00009694
    7 |         #读取输入，假设三个数以空格分隔
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.c:10:11: error: invalid preprocessing directive #\U00008f93\U00005165\U00004e0d\U00007b26\U00005408\U00008981\U00006c42\U0000ff0c\U00008f93\U000051fa
   10 |         # 输入不符合要求，输出 N
      |           ^~~~~~~~~~~~~~~~~~~~
/in/foo.c:15:11: error: invalid preprocessing directive #\U00008f6c\U00006362\U00004e3a\U00006d6e\U000070b9\U00006570
   15 |         # 转换为浮点数
      |           ^~~~~~~~~~~~
/in/foo.c:18:11: error: invalid preprocessing directive #\U00008f6c\U00006362\U00005931\U00008d25\U0000ff0c\U00008f93\U000051fa
   18 |         # 转换失败，输出 N
      |           ^~~~~~~~~~~~~~
/in/foo.c:22:7: error: invalid preprocessing directive #\U00008fb9\U0000957f\U00005fc5\U0000987b\U00004e3a\U00006b63\U00006570
   22 |     # 边长必须为正数
      |       ^~~~~~~~~~~~~~
/in/foo.c:27:7: error: invalid preprocessing directive #\U000068c0\U000067e5\U00004e09\U000089d2\U00005f62\U00004e0d\U00007b49\U00005f0f
   27 |     # 检查三角形不等式
      |       ^~~~~~~~~~~~~~~~