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题库练习 Area of Two Circles' Intersection

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A10125 | $Area of Two Circles' Intersection$

时间限制1s

内存限制256MB

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题目描述

You are given two circles. Find the area of their intersection.

输入格式

The first line contains three integers $x_{1},y_{1},r_{1}$ ( $-10^{9}<=x_{1},y_{1}<=10^{9},1<=r_{1}<=10^{9}$ ) — the position of the center and the radius of the first circle. The second line contains three integers $x_{2},y_{2},r_{2}$ ( $-10^{9}<=x_{2},y_{2}<=10^{9},1<=r_{2}<=10^{9}$ ) — the position of the center and the radius of the second circle.

输出格式

Print the area of the intersection of the circles. The answer will be considered correct if the absolute or relative error doesn't exceed $10^{-6}$ .

输入输出样例

输入 #1

0 0 4
6 0 4

输出 #1

7.25298806364175601379

输入 #2

0 0 5
11 0 5

输出 #2

0.00000000000000000000

C++ 编辑器

输入

输出