/in/foo.cc: In function 'void P2051::input()':
/in/foo.cc:255:11: warning: enumeration value '__PLACE_HOLDER__' not handled in switch [-Wswitch]
    switch (type)
           ^
/in/foo.cc: In function 'void P2051::algorithm()':
/in/foo.cc:363:12: warning: enumeration value '__PLACE_HOLDER__' not handled in switch [-Wswitch]
     switch (order.type)
            ^