运行 ID: 38987

Main.cc:1:3: error: stray ‘#’ in program
 b #include                      //O(nlogn)?
   ^
Main.cc:1:1: error: ‘b’ does not name a type
 b #include                      //O(nlogn)?
 ^
Main.cc: In function ‘int main()’:
Main.cc:14:2: error: ‘cin’ was not declared in this scope
  cin>>n;
  ^~~
Main.cc:14:2: note: suggested alternative: ‘main’
  cin>>n;
  ^~~
  main
Main.cc:21:4: error: ‘cout’ was not declared in this scope
    cout<