摘要：
题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=6863 CSDN食用链接：https://blog.csdn.net/qq_43906000/article/details/107991168 Problem Description It is pre 阅读全文
摘要：
题目链接：https://codeforces.com/problemset/problem/1395/C CSDN食用链接：https://blog.csdn.net/qq_43906000/article/details/107973093 Boboniu likes bit operation 阅读全文