black_hole6的博客

链接：https://ac.nowcoder.com/acm/contest/289/D 来源：牛客网   时间限制：C/C++ 1秒，其他语言2秒 空间限制：C/C++ 131072K，其他语言262144K 64bit IO Format: %lld 题目描述     小明在上学的路上，看到了小花，小花也看见了他，两个人深情的对视了一下，然后小花就对小明说：你爱过我吗？小明说：爱过。...

Amr loves Geometry. One day he came up with a very interesting problem. Amr has a circle of radius r and center in point (x, y). He wants the circle center to be in new position (x', y'). In one ste...

Arpa is taking a geometry exam. Here is the last problem of the exam. You are given three points a, b, c. Find a point and an angle such that if we rotate the page around the point by the angle, the...