/in/foo.cc:1:24: warning: extra tokens at end of #include directive
    1 | #include<bits/stdc++.h>;
      |                        ^
/in/foo.cc: In function 'bool hw(std::string)':
/in/foo.cc:7:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |         for(int i=0;i<=str.size()/2;i++)
      |                     ~^~~~~~~~~~~~~~