对于可拓学中统一集的描述。统一集是模式识别的另外一种思路,很值得学习。-For a unified set of extenics in the description. Uniform set is another idea of pattern recognition, it is worth learning.
有n个人围成一圈,顺序编号。从第一个人开始报数(从1到3),凡报到3的人退出圈子,问最后一个圈中的人的编号?-n personal cordons of serial numbers. Started from the first report (from 1-3), who reported three people from the circle, asking a final lap of the numbers?