/in/foo.cc:1:1: error: 'include' does not name a type
 include<bits/stdc++.h>
 ^~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:5:1: error: 'cin' was not declared in this scope
 cin >> a;
 ^~~
/in/foo.cc:11:1: error: 'cout' was not declared in this scope
 cout <<a - f<< endl;
 ^~~~
/in/foo.cc:11:16: error: 'endl' was not declared in this scope
 cout <<a - f<< endl;
                ^~~~