/in/foo.cc: In member function 'HugeInt HugeInt::operator-(HugeInt)':
/in/foo.cc:190:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0;i <ans.size();i++)
                ~~^~~~~~~~~~~
/in/foo.cc: In member function 'HugeInt HugeInt::operator+(HugeInt)':
/in/foo.cc:131:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^