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Competitions

WEEK5 GEOMETRY

The height of the triangle

The area of triangle is S. The length of its base is a greater than its height. Find the height of the triangle.

Input

Two integers S (0 < S100) and a (|a| ≤ 100).

Output

Print the height of triangle with two digits after the decimal point.

Time limit 1 second
Memory limit 128 MiB
Input example #1
15 1
Output example #1
5.00