foo.cc:1:1: error: 'include' does not name a type
    1 | include<bits/stdc++.h>
      | ^~~~~~~
foo.cc: In function 'int main()':
foo.cc:6:9: error: 'cin' was not declared in this scope
    6 |         cin>>n;
      |         ^~~
foo.cc:18:9: error: 'cout' was not declared in this scope
   18 |         cout<<num<<endl;
      |         ^~~~
foo.cc:18:20: error: 'endl' was not declared in this scope
   18 |         cout<<num<<endl;
      |                    ^~~~

[Hydro](https://hydro.ac)提供评测服务