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-----
2

-----Sample Output-----
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.

Difficulty: introductory

Starter code:

Solutions:
r=int(input())
print(r**2)

x = int(input())
print((x*x))


print(int(input())**2)

r = int(input())
print(r**2)

# coding: utf-8
# Your code here!

r=int(input())
print(r**2)

r=int(input())
print(r**2)

print(int(input()) ** 2)

r=int(input())
print(r**2)

r=int(input())
print(r**2)

r  = int(input())
print(r*r)

R = int(input())
print(R**2)

print(int(input())**2)

r = int(input())

print(r**2)

a = int(input())
print(a ** 2)

n=int(input())
print(n**2)

print(int(input())**2)

r = int(input())
print(r*r)

r=int(input())
print(int(r**2))

r = int(input())
print(int(r*r))

n = int(input())
print(n**2)

r = input()
print(int(r) ** 2)

r=int(input())
print((r**2))


N = int(input())
print(int(N**2))

r = int(input())
print(r*r)

print(int(input())**2)

r = int(input())

print(r * r)

r = int(input())

print(r**2)

print(int(input())**2)

r = int(input())
print((r * r))


def resolve():
    n = int(input())
    print(n**2)
resolve()

r = int(input())
print(r*r)

r = int(input())
print(r**2)

r = int(input())

print(r**2)

r = int(input(""))
print(r**2)

print(int(input())**2)

r=int(input())
r**=2
print(r)

r = int(input())
print(r ** 2)

n = int(input())
print(n*n)

print((int(input()) ** 2))


n = int(input())

print(n ** 2)

x = int(input())
y = x * x
print(y)

print(int(input())**2)

n = int(input())
print(n ** 2)

a = int(input())
print(a ** 2)

r = int(input())

print(r*r)

r=int(input())
print(r**2)

#!/usr/bin/env python3
from collections import defaultdict, Counter
from itertools import product, groupby, count, permutations, combinations
from math import pi, sqrt
from collections import deque
from bisect import bisect, bisect_left, bisect_right
from string import ascii_lowercase
from functools import lru_cache
import sys
sys.setrecursionlimit(500000)
INF = float("inf")
YES, Yes, yes, NO, No, no = "YES", "Yes", "yes", "NO", "No", "no"
dy4, dx4 = [0, 1, 0, -1], [1, 0, -1, 0]
dy8, dx8 = [0, -1, 0, 1, 1, -1, -1, 1], [1, 0, -1, 0, 1, 1, -1, -1]


def inside(y, x, H, W):
    return 0 <= y < H and 0 <= x < W


def ceil(a, b):
    return (a + b - 1) // b


def sum_of_arithmetic_progression(s, d, n):
    return n * (2 * s + (n - 1) * d) // 2


def gcd(a, b):
    if b == 0:
        return a
    return gcd(b, a % b)


def lcm(a, b):
    g = gcd(a, b)
    return a / g * b


def solve():
    r = int(input())
    print((r * r))


def main():
    solve()


def __starting_point():
    main()

__starting_point()

r = int(input())
print(r**2)

r = int(input())
print(r**2)

r = int(input())
print(r*r)

r=int(input())
print(pow(r,2))

n = int(input())
print(n**2)

r = int(input())
print(r**2)

r=int(input())
print(r**2)

r = int(input())
print(r * r)

r = int(input())
print(r**2)

r = int(input())

print(r*r)

r = int(input())
print((r ** 2))


print(int(input())**2)

r = int(input())
print(r * r)

r = int(input())
print(r**2)

n=int(input())
print(n**2)

r = int(input())
print(r ** 2)

print(int(input())**2)

print(int(input())**2)

print(int(input())**2)

print(int(input())**2)

print(int(input())**2)

r = int(input() )
print(r*r)

n=int(input())
print(n**2)



r=int(input())

print(r**2)

x =int(input())
print(x**2)

print(int(input())**2)

r = int(input())

print(r ** 2)

r = int(input())
print(r * r)

r=int(input())
print((r**2))


print(int(input())**2)

r = int(input())
print(r**2)

#
# abc145 a
#
import sys
from io import StringIO
import unittest


class TestClass(unittest.TestCase):
    def assertIO(self, input, output):
        stdout, stdin = sys.stdout, sys.stdin
        sys.stdout, sys.stdin = StringIO(), StringIO(input)
        resolve()
        sys.stdout.seek(0)
        out = sys.stdout.read()[:-1]
        sys.stdout, sys.stdin = stdout, stdin
        self.assertEqual(out, output)

    def test_入力例_1(self):
        input = """2"""
        output = """4"""
        self.assertIO(input, output)

    def test_入力例_2(self):
        input = """100"""
        output = """10000"""
        self.assertIO(input, output)


def resolve():
    r = int(input())

    print((r**2))


def __starting_point():
    # unittest.main()
    resolve()

__starting_point()

r = int(input())
print(r*r)

#145-A

r = int(input())

print((r**2))


r = int(input())
print(r**2)

r = int(input())
print(r*r)

print((int(input())**2))


r = int(input())

print(r*r)

str = input()
print(int(str)**2)

print(int(input())**2)

r=int(input())
print(r*r)

r=int(input())
print(r*r)

a=int(input())
print((int(a**2)))


a=int(input())
print(a * a)

r = int(input())
print(r**2)

r = int(input())
print(r**2)

r=int(input())
print(r*r)

n = int(input())
print(n**2)

r = int(input())
print(r ** 2)

print(int(int(input())**2))

print(int(input())**2)

r=int(input())
print(r**2)