同心圆

rmin=eval(input())
number=eval(input())
color=input()
import turtle as t
t.pencolor(color)
t.pensize(4)
for i in range (number):
t.circle(rmin)
rmin=rmin+20
t.penup()
t.seth(-90)
t.fd(20)
t.seth(0)
t.pendown()
t.hideturtle()
t.done()