/in/foo.cc: In function 'bool yuudachi(int)':
/in/foo.cc:15:49: warning: operation on 'ind' may be undefined [-Wsequence-point]
     while(ta[ind].first&&ta[ind].second!=num)ind=((++ind)%maxta);
                                              ~~~^~~~~~~~~~~~~~~~
/in/foo.cc: In member function 'bool poi::insert(int)':
/in/foo.cc:24:53: warning: operation on 'ind' may be undefined [-Wsequence-point]
         while(va[ind].first&&va[ind].second!=num)ind=((++ind)%maxva);
                                                  ~~~^~~~~~~~~~~~~~~~