/in/foo.cc:6:2: error: stray '#' in program
    6 | }#include<iostream>
      |  ^
/in/foo.cc:6:3: error: 'include' does not name a type
    6 | }#include<iostream>
      |   ^~~~~~~
/in/foo.cc:8:5: error: redefinition of 'int main()'
    8 | int main(){
      |     ^~~~
/in/foo.cc:3:5: note: 'int main()' previously defined here
    3 | int main(){
      |     ^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:16:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |                 for(int i=0;i<n.size();i++){
      |                             ~^~~~~~~~~