/in/foo.cc: In function 'void try_move(int)':
/in/foo.cc:44:43: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if ((x+dir[i][0]>=0)&&(x+dir[i][0]<3)&&(y+dir[i][1]>=0)&&(y+dir[i][1]<3))
                                          ~^~~~~~~~~~
/in/foo.cc:57:17: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   bfs[now][x][y]=0;
   ~~~~~~~~~~~~~~^~