e-olymp
Competitions

July 18 ADA Training - Geometry

Polar angle of a point

Find the polar angle of the point.

Input

Two integers are given - the decart coordinates of the point that does not coincide with the origin. Input values do not exceed 10000 by the absolute value.

Output

Print one real number - the value of its polar angle in radians in the interval [0; ). The answer must be rounded to 6 digits after the decimal point.

Time limit 1 second
Memory limit 128 MiB
Input example #1
2 3
Output example #1
0.982794