# #475. 【CTS2019】田野

Last night I saw you running

In the open fields of grace

No longer were you broken or in pain

1
0 0 0 1

2.00000000

### 样例二

4
-2 7 -1 7
0 0 0 1
2 -3 5 5
1 0 6 -1

#### output

23.563573998194637061425470524757

4
-1 1 -1 3
0 4 2 4
3 1 3 3
0 0 2 0

### 样例三

#### input

13.656854249492380195206754896839