/in/foo.cc:1:1: error: stray '##' in program
##include<iostream>
^~
/in/foo.cc:1:3: error: 'include' does not name a type
##include<iostream>
^~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:7:2: error: 'cin' was not declared in this scope
cin>>n;
^~~
/in/foo.cc:15:3: error: 'cout' was not declared in this scope
cout<<"Yes"<<endl;
^~~~
/in/foo.cc:15:16: error: 'endl' was not declared in this scope
cout<<"Yes"<<endl;
^~~~
/in/foo.cc:17:3: error: 'cout' was not declared in this scope
cout<<"No";
^~~~