Problem:
Score : 100 points

Problem Statement

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.

Constraints

1 \leq r \leq 100

All values in input are integers.

Input

Input is given from Standard Input in the following format:

r

Output

Print the area of a circle of radius r, divided by the area of a circle of radius 1, as an integer.

Sample Input 1

2

Sample Output 1

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.

Sample Input 2

100

Sample Output 2

10000

Solution in Python (3.4.3) (judge verdict: Runtime Error)

N = int(input())
Mylist = list(input())
ANSlist = []
if N%2 == 1:
  print("No")
else: 
    for i in range(N/2):
        if Mylist[i] == Mylist[i + N/2]:
        ANSlist.append("Yes")
    if len(ANSlist) == N/2:
        print("Yes")