为了简单,分配了1到9层.另外也没加入有几人同时按,不过那样也不难,再分配10个每层的变量,随机按.再处理,是先向上还是直接向下.-For simplicity, the distribution of the 1-9 layers. There is also the same time, several people did not join the press, but so is not difficult, the redistribution of 10 variables in e