superxtong的博客

Coach Yu has lots of bags, every bag has its number. And what is more, he wants to send these bags to acm team-member. But he requires that if you get the bag and its number is b, you need to count how

Boss Yu said that he will give gifts to the members who passed this TJU ACM recruitment contest and I guess the gifts will be some bags. But here comes the problem: suppose there are N people and M ba