/in/foo.cc: In constructor 'Line::Line(std::__cxx11::string)':
/in/foo.cc:58:7: warning: unused variable 'i' [-Wunused-variable]
   int i=0,j=0,k=-1,m=s.length();
       ^
/in/foo.cc: In function 'int Search(Line, Line)':
/in/foo.cc:75:12: warning: unused variable 'i' [-Wunused-variable]
  int cnt=0,i=0,j=0;
            ^
/in/foo.cc:75:16: warning: unused variable 'j' [-Wunused-variable]
  int cnt=0,i=0,j=0;
                ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:101:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<input.length();i++)
              ~^~~~~~~~~~~~~~~