Score : 100 points
Given is an integer r.
How many times is the area of a circle of radius r larger than the area of a circle of radius 1?
It can be proved that the answer is always an integer under the constraints given.
Input is given from Standard Input in the following format:
r
Print the area of a circle of radius r, divided by the area of a circle of radius 1, as an integer.
2
4
The area of a circle of radius 2 is 4 times larger than the area of a circle of radius 1.
Note that output must be an integer - for example, 4.0
will not be accepted.
100
10000