Given a three-dimensional vector's components, find the magnitude of the vector.

Input Specification

The first line will contain three integers, ~u_x, u_y, u_z~ ~(|u_x|, |u_y|, |u_z| \le 10^9)~, the components of the vector.

Output Specification

Output the magnitude of the vector, rounded to exactly three decimal places.

Sample Input

2 3 -1

Sample Output

3.742