2018年6月4日
Xor Sum
摘要： 6498: Xor Sum 题目描述 You are given a positive integer N. Find the number of the pairs of integers u and v (0≤u,v≤N) such that there exist two non-negati 阅读全文
posted @ 2018-06-04 15:41 Gang_Li 阅读(153) 评论(0) 推荐(0)