N
A
M
E
:
P
a
r
k
T
a
e
B
i
n
I
k
e
e
p
p
r
o
m
i
s
e
s
b
e
t
w
e
e
n
P
r
o
f
a
n
d
I
H
W
_
7
P
r
o
b
l
e
m
s
w
i
t
h
R
L
1
.
T
h
e
n
u
m
b
e
r
o
f
p
r
o
d
u
c
t
s
t
h
a
t
c
a
n
b
e
p
r
o
d
u
c
e
d
c
h
a
n
g
e
s
.
2
.
C
o
s
t
s
c
h
a
n
g
e
a
l
l
t
h
e
t
i
m
e
3
.
I
n
r
e
a
l
i
t
y
,
d
e
m
a
n
d
c
o
n
s
t
a
n
t
l
y
c
h
a
n
g
e
s
.
4
.
I
n
r
e
a
l
i
t
y
t
h
e
c
a
l
c
u
l
a
t
i
o
n
s
a
r
e
m
u
c
h
m
o
r
e
c
o
m
p
l
i
c
a
t
e
d
5
.
I
n
r
e
a
l
i
t
y
,
t
h
e
r
e
a
r
e
m
a
n
y
m
o
r
e
v
a
r
i
a
b
l
e
s
.
H
W
_
6
H
W
_
5
x
1
(
7
s
i
n
(
x
3
)
x
2
2
x
4
2
-
2
c
o
s
(
x
3
)
+
6
x
1
4
x
4
+
2
x
1
2
x
2
2
H
W
_
3
H
W
_
2
문
제
:
M
a
x
x
1
+
2
x
2
+
x
3
+
3
x
4
+
2
x
5
+
x
6
x
1
+
x
2
+
x
3
+
x
4
+
x
5
+
x
6
2
x
1
+
x
2
+
2
x
3
+
1
x
4
+
2
x
5
+
1
x
6
x
1
+
2
x
2
+
x
3
1
x
2
+
2
x
4
+
x
5
x
3
+
1
x
4
+
2
x
5
+
x
6
x
1
+
x
3
+
x
5
x
6
x
1
~
6
H
W
_
4