foo.cc:1:10: error: #include expects "FILENAME" or <FILENAME>
 #include ＜bits/stdc++.h＞
          ^
foo.cc: In function 'int main()':
foo.cc:15:2: error: 'cin' was not declared in this scope
  cin>>n>>m;
  ^~~
foo.cc:15:2: note: suggested alternative: 'main'
  cin>>n>>m;
  ^~~
  main
foo.cc:36:2: error: 'cout' was not declared in this scope
  cout<<temp<<endl;
  ^~~~
foo.cc:36:14: error: 'endl' was not declared in this scope
  cout<<temp<<endl;
              ^~~~
foo.cc:36:14: note: suggested alternative: 'enum'
  cout<<temp<<endl;
              ^~~~
              enum

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。