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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 56.5000001Â°, then output **57Â°**.

If angle is 56.5000000Â°, then output **57Â°**.

If angle is 56.4999999Â°, then output **56Â°**.

**Sample Input**

```
10
10
```

**Sample Output**

```
45Â°
```