Compute the L2 norm of a vector

Given a list of numbers, compute its L2 (Euclidean) norm: sqrt(sum(x_i^2)).

Input: One line of space-separated numbers.

Output: The L2 norm (a single number). Round to 2 decimal places for comparison.

Example:

• Input: 3 4
• Output: 5.0 (sqrt(9+16) = 5)