Problems
The height of triangle
The height of triangle
The area of triangle is S. The length of its base is a greater than its height. Find the height of triangle.
Input data
Two integers S (0 < S ≤ 100) and a (|a| ≤ 100).
Output data
Print the height of triangle with two digits after the decimal point.
Examples
Input example #1
15 1
Output example #1
5.00