# The height of triangle

Very easy

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

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

## Input

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

## Output

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

## Examples

Input #1

Answer #1

Submissions 12K

Acceptance rate 45%