/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 function 'int Judge(int, int)':
/in/foo.cc:305:9: warning: unused variable 'i' [-Wunused-variable]
     int 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]
 }
 ^