题目描述

Click here to read PDF of this problem

输入格式

As shown in the PDF.

输出格式

As shown in the PDF

样例

3 2 -2 2 
20 30 
70 400 
80 250

30.000 
284.316 
250.000 

3 2 -2 2 
60 350 
70 400 
90 250

350.000 
350.758 
250.000

3 2 -1 1 
38 200 
60 400 
70 300

200.000 
287.500 
300.000

提示

By 秦浩源