题目：有n个人围成一圈，顺序排号。从第一个人开始报数（从1到3报数），凡报到3的人退出圈子，问最后留下的是原来第几号的那位。-Title: There are n individuals form a circle, the order Paihao. The number of individuals starting from the first report (from 1 to 3 reported numbers), who report to three people out of circle and asked the last remaining of the original who first few numbers.