is a right triangle, at .
Therefore, .
Point is the midpoint of hypotenuse .
You are given the lengths and .
Your task is to find (angle , as shown in the figure) in degrees.
Input Format
The first line contains the length of side .
The second line contains the length of side .
Constraints
- Lengths and are natural numbers.
Output Format
Output 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°