find-angle

Find Angle MBC ⬀

ABC is a right triangle, 90° at B.

Therefore, ∡ABC = 90°.

Point M is the midpoint of hypotenuse AC.

You are given the lengths AB and BC.

Your task is to find ∡MBC (angle θ°, as shown in the figure) in degrees.

Input Format

• The first line contains the length of side AB.
• The second line contains the length of side BC.

Constraints

• 0 < AB ≤ 100
• 0 < BC ≤ 100
• Lengths AB and BC are natural numbers.

Output Format

• Output ∡MBC in degrees.

Note: Round the angle to the nearest integer.

Examples:

• If angle is 56.5000001°, then output 57°.
• If angle is 56.5000000°, then output 57°.
• If angle is 56.4999999°, then output 56°.

Sample Input

10
10

Sample Output

45°