摘要：
Problem DescriptionN people numbered from 1 to N are waiting in a bank for service. They all stand in a queue, but the queue never moves. It is lunch ... 阅读全文
摘要：
Problem DescriptionLet L denote the number of 1s in integer D’s binary representation. Given two integers S1 and S2, we call D a WYH number if S1≤L≤S2... 阅读全文