/in/foo.cc:1:1: error: stray '\347' in program
 练习1 - 欧拉回路
 ^
/in/foo.cc:1:2: error: stray '\273' in program
 练习1 - 欧拉回路
  ^
/in/foo.cc:1:3: error: stray '\203' in program
 练习1 - 欧拉回路
   ^
/in/foo.cc:1:4: error: stray '\344' in program
 练习1 - 欧拉回路
    ^
/in/foo.cc:1:5: error: stray '\271' in program
 练习1 - 欧拉回路
     ^
/in/foo.cc:1:6: error: stray '\240' in program
 练习1 - 欧拉回路
      ^
/in/foo.cc:1:11: error: stray '\346' in program
 练习1 - 欧拉回路
           ^
/in/foo.cc:1:12: error: stray '\254' in program
 练习1 - 欧拉回路
            ^
/in/foo.cc:1:13: error: stray '\247' in program
 练习1 - 欧拉回路
             ^
/in/foo.cc:1:14: error: stray '\346' in program
 练习1 - 欧拉回路
              ^
/in/foo.cc:1:15: error: stray '\213' in program
 练习1 - 欧拉回路
               ^
/in/foo.cc:1:16: error: stray '\211' in program
 练习1 - 欧拉回路
                ^
/in/foo.cc:1:17: error: stray '\345' in program
 练习1 - 欧拉回路
                 ^
/in/foo.cc:1:18: error: stray '\233' in program
 练习1 - 欧拉回路
                  ^
/in/foo.cc:1:19: error: stray '\236' in program
 练习1 - 欧拉回路
                   ^
/in/foo.cc:1:20: error: stray '\350' in program
 练习1 - 欧拉回路
                    ^
/in/foo.cc:1:21: error: stray '\267' in program
 练习1 - 欧拉回路
                     ^
/in/foo.cc:1:22: error: stray '\257' in program
 练习1 - 欧拉回路
                      ^
/in/foo.cc:52:1: error: stray '\342' in program
 ——————————————————————————————————
 ^
/in/foo.cc:52:2: error: stray '\200' in program
 ——————————————————————————————————
  ^
/in/foo.cc:52:3: error: stray '\224' in program
 ——————————————————————————————————
   ^
/in/foo.cc:52:4: error: stray '\342' in program
 ——————————————————————————————————
    ^
/in/foo.cc:52:5: error: stray '\200' in program
 ——————————————————————————————————
     ^
/in/foo.cc:52:6: error: stray '\224' in program
 ——————————————————————————————————
      ^
/in/foo.cc:52:7: error: stray '\342' in program
 ——————————————————————————————————
       ^
/in/foo.cc:52:8: error: stray '\200' in program
 ——————————————————————————————————
        ^
/in/foo.cc:52:9: error: stray '\224' in program
 ——————————————————————————————————
         ^
/in/foo.cc:52:10: error: stray '\342' in program
 ——————————————————————————————————
          ^
/in/foo.cc:52:11: error: stray '\200' in program
 ——————————————————————————————————
           ^
/in/foo.cc:52:12: error: stray '\224' in program
 ——————————————————————————————————
            ^
/in/foo.cc:52:13: error: stray '\342' in program
 ——————————————————————————————————
             ^
/in/foo.cc:52:14: error: stray '\200' in program
 ——————————————————————————————————
              ^
/in/foo.cc:52:15: error: stray '\224' in program
 ——————————————————————————————————
               ^
/in/foo.cc:52:16: error: stray '\342' in program
 ——————————————————————————————————
                ^
/in/foo.cc:52:17: error: stray '\200' in program
 ——————————————————————————————————
                 ^
/in/foo.cc:52:18: error: stray '\224' in program
 ——————————————————————————————————
                  ^
/in/foo.cc:52:19: error: stray '\342' in program
 ——————————————————————————————————
                   ^
/in/foo.cc:52:20: error: stray '\200' in program
 ——————————————————————————————————
                    ^
/in/foo.cc:52:21: error: stray '\224' in program
 ——————————————————————————————————
                     ^
/in/foo.cc:52:22: error: stray '\342' in program
 ——————————————————————————————————
                      ^
/in/foo.cc:52:23: error: stray '\200' in program
 ——————————————————————————————————
                       ^
/in/foo.cc:52:24: error: stray '\224' in program
 ——————————————————————————————————
                        ^
/in/foo.cc:52:25: error: stray '\342' in program
 ——————————————————————————————————
                         ^
/in/foo.cc:52:26: error: stray '\200' in program
 ——————————————————————————————————
                          ^
/in/foo.cc:52:27: error: stray '\224' in program
 ——————————————————————————————————
                           ^
/in/foo.cc:52:28: error: stray '\342' in program
 ——————————————————————————————————
                            ^
/in/foo.cc:52:29: error: stray '\200' in program
 ——————————————————————————————————
                             ^
/in/foo.cc:52:30: error: stray '\224' in program
 ——————————————————————————————————
                              ^
/in/foo.cc:52:31: error: stray '\342' in program
 ——————————————————————————————————
                               ^
/in/foo.cc:52:32: error: stray '\200' in program
 ——————————————————————————————————
                                ^
/in/foo.cc:52:33: error: stray '\224' in program
 ——————————————————————————————————
                                 ^
/in/foo.cc:52:34: error: stray '\342' in program
 ——————————————————————————————————
                                  ^
/in/foo.cc:52:35: error: stray '\200' in program
 ——————————————————————————————————
                                   ^
/in/foo.cc:52:36: error: stray '\224' in program
 ——————————————————————————————————
                                    ^
/in/foo.cc:52:37: error: stray '\342' in program
 ——————————————————————————————————
                                     ^
/in/foo.cc:52:38: error: stray '\200' in program
 ——————————————————————————————————