in

8
50 50
50 -50
-50 50
-50 -50
50 50
50 -50
-50 50
-50 -50

out

400.00

---

阵亡的题解：

（没码的不测）

https://www.luogu.com.cn/article/td3ah746 第一份代码 741.42

https://www.luogu.com.cn/article/su9eo2wj 741.42

https://www.luogu.com.cn/article/4a28f6t6 541.42

https://www.luogu.com.cn/article/4a28f6t6 682.84

https://www.luogu.com.cn/article/5tzqz90h 682.84

https://www.luogu.com.cn/article/lsk85a08 956.82

https://www.luogu.com.cn/article/amnqx81n RE