0016 --- calculate the circumference and area of the circle

Calculate the circumference and area of the circle

Difficulty level: A; running time limit: 1000 ms; running space limit: KB; code length limit: B

Question description

Enter a positive number to indicate the radius of a circle, and calculate and output the circumference and area of the circle.

Input

A positive number (which may have a decimal point)

Output

Two positive numbers separated by a space, representing the circumference and area of the circle respectively

Input example

2.5

Output example

15.708 19.6349

Other Instructions

The number of inputs cannot exceed 1000, and the circumference rate is 3.14159.

This question is still a set of formulas. You do not need to add more BB codes directly.

Pay attention to the question of π, just take 3.14159.

The Code is as follows:

# Include <iostream> # include <cmath> using namespace STD; int main () {double A, B, C; CIN> A; B = 2 * a * 3.14159; C = A * a * 3.14159; cout <B <"" <C <Endl; return 0 ;}
 

0016 --- calculate the circumference and area of the circle