摘要：struct Point { double x, y; Point() {} Point(double a, double b) { x = a, y = b; } bool operator == (Point a) { return sgn(x-a.x) == 0 && sgn(y-a.y) == 0; } ... 阅读全文

摘要：The Korea Defense and Science Institute, shortly KDSI, has been putting constant effort into newequipment for individual soldiers for recent years, an 阅读全文

摘要：给出n个电脑，每个电脑连着n个服务，然后每个电脑都连着m个邻电脑，如果当前的电脑某个服务被断开了，相邻的电脑的服务也会被断开，每个电脑都只能操作一次，问你最多可以让多少种服务被断开。一种服务被断开的条件就是存在一个破坏第i个电脑的集合，这个集合扩散出去的集合是全集（......语文真的是...... 阅读全文