Question

如下图,有15间房,相邻房间[互通],规定只能由[号码小]的房间走到[号码大]的房间

Answer 1

1-3-6-10 1-3-5-9-10 1-3-5-6-9-10 1-3-5-8-9-10 1-2-4-7-8-9-10 1-2-5-9-10 1-2-3-6-10 1-2-5-8-9-10 等等,