摘要：
Anton and Classes Anton likes to play chess. Also he likes to do programming. No wonder that he decided to attend chess classes and programming classe 阅读全文
摘要：
https://www.luogu.org/problem/show?pid=1056 题目描述 上课的时候总会有一些同学和前后左右的人交头接耳，这是令小学班主任十分头疼的一件事情。不过，班主任小雪发现了一些有趣的现象，当同学们的座次确定下来之后，只有有限的D对同学上课时会交头接耳。同学们在教室中坐 阅读全文