One clever student have invented a system to measure temperature in his aquarium: hi puts a plate on the walls of the aquarium on the bottom of this plate there is a joint with a cylindrical thermometer. The student have noticed that when the system is installed thermometer deviates from a vertical in such a way that he has exactly x% of his length in the water (see the picture).
Task. Calculate density of this thermometer if it is uniform. Density of water is 1000 kg/m3.
Streams. Input stream contains one real number x (0<x<100). Output stream should contain one real number with accuracy of 2 digits after the decimal point.
ExampleInput stream:25.2Output stream:440.50