bencake

題目誤導人~# X# ~$ b8 _# ^" m' C
owner 100
; P3 M% I3 Y5 E2 }, b2 g3 D& w公仔箱論壇owner's son 205.39.217.77:8898% E8 v2 m! w" m2 p% ^
each pay 40
' N4 S! N' J4 }+ B- }7 N40*3 = 120
0 G6 A2 Z% m! etvb now,tvbnow,bttvb120(3 guys) - 20(owner's son) = 100 (owner)