p
a
r
a
m
e
t
e
r
s
i
n
f
(
n
)
=
a
f
(
n
-
b
f
(
n
-
c
)
)
:
a
2
b
3
c
4
r
a
n
g
e
o
f
n
1
0
0
0
j
o
i
n
p
o
i
n
t
s
