/in/foo.cc: In function 'int Searchkongge(std::__cxx11::string, int*)':
/in/foo.cc:8:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<s.length(); i++)
               ~^~~~~~~~~~~
/in/foo.cc: In function 'void opposide(std::__cxx11::string, int*, int)':
/in/foo.cc:17:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int k=0; k<s.length()-c[nc-1]-1; k++)
               ~^~~~~~~~~~~~~~~~~~~~~