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** < **S** ≤ **100**) and **a** (|**a**| ≤ **100**).

#### Output

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

Input example #1

15 1

Output example #1

5.00