/in/foo.cc: In constructor 'Data::Data(long long int)':
/in/foo.cc:6:32: warning: 'Data::mo' will be initialized after [-Wreorder]
  int sum, len, lo, ro, lz, rz, mo, mz;
                                ^~
/in/foo.cc:6:24: warning:   'long long int Data::lz' [-Wreorder]
  int sum, len, lo, ro, lz, rz, mo, mz;
                        ^~
/in/foo.cc:8:2: warning:   when initialized here [-Wreorder]
  Data(int k) :
  ^~~~