2017 年 8月 9 日随笔档案 - Crutain

2017年8月9日

摘要： A ring is compose of n circles as shown in diagram. Put natural number 1, 2, ..., n into each circle separately, and the sum of numbers in two adjacen 阅读全文

posted @ 2017-08-09 23:29 Crutain 阅读(104) 评论(0) 推荐(0)