车厢调度假设停在铁路调度站入口处的车厢序列的编号依次为1，2，3……N。设计一个程序，求出所有由此输出的长度为N的车厢序列。 -Scheduling train stopped on the assumption that the railway station at the entrance to the train scheduling sequence followed by the number 1,2,3 ... ... N. Design a procedure to derive