2017年2月21日

1015. Reversible Primes (20)

摘要： A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a re 阅读全文

posted @ 2017-02-21 09:58 小小旅行商 阅读(219) 评论(0) 推荐(0) 编辑