/in/foo.cc: In function 'int main()':
/in/foo.cc:9:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i=0;i<line.size()-2;i++)
      |                 ~^~~~~~~~~~~~~~
/in/foo.cc:12:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |         for(int j=i+1;j<line.size()-1;j++)
      |                       ~^~~~~~~~~~~~~~
/in/foo.cc:15:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |             for(int k=j+1;k<line.size();k++)
      |                           ~^~~~~~~~~~~~