import random
hit=0
n=int(input())
for _ in range(n):
    x=random.randint(0,1)
    y=random.randint(0,1)
    if x**2 + y**2 <=1:
        hit=hit+1
pi=4*(hit/n)
print (pi)
org_pi=3.1416

diff=org_pi-pi
print(diff)