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764. The height of the triangle
Vaqt limiti: 1 sekund
Xotira limiti: 64 MB

The area of the 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 < S ≤ 100),  and a (|a| ≤ 100).

Output

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

Input

Output

1

15 1

5.00

 

Tayyorladi: Azat Yusupov
Text from: e-olimp.com
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