| 시간 제한 | 메모리 제한 | 제출 | 정답 | 맞힌 사람 | 정답 비율 |
|---|---|---|---|---|---|
| 1 초 (추가 시간 없음) | 2048 MB | 162 | 93 | 61 | 57.547% |
Farmer Fred has a farm with a circular-shaped field on which he is keeping horses. A few of his horses have already been killed by a pack of hungry wolves, therefore farmer Fred wants to construct fences around the field. Fred knows the area of his field. Your job is to create a program that takes as input the area of his circular shaped field in square meters and outputs the total length of the fence needed guard the horses from the wolves, in meters. Note that Fred is going to buy his fence from the Fence Protect Corporation (FPC) which only sells fences per 10 centimeter.
A single integer $f$ (1ドル \leq f \leq 10^{18}$), the area of the field in square meters.
Output the total length of fence needed for the field, in meters.
12
12.3
46
24.1
96
34.8