from turtle import (
    forward,
    back,
    left,
    right,
    penup,
    pendown,
    color,
)
#
resolution = 10
scale =2

def center():
    #penup()
    left(90)
    forward(resolution * 3.14159)
    right(90)
    #pendown()

center()
for i in range(resolution):
    forward(360/resolution * scale)
    right(360/resolution)

input()