2020年6月8日
C. Primes and Multiplication
摘要： Let's introduce some definitions that will be needed later. Let prime(x)prime(x) be the set of prime divisors of xx. For example, prime(140)={2,5,7}pr 阅读全文
posted @ 2020-06-08 10:33 DeaL57 阅读(137) 评论(0) 推荐(0) 编辑