9
lfpgbnlzyn
c
s
w
r
m
q
y
yinfblfcdhidphyfvgkxyuwomahiibbhnigdslsguhjkplibnhhrshtekwgefxeugyyyyy
 6
u
p
m
z
v
vv
 4
qe
nd
iqryhukieskfvaeettersinksrmazelxtgvartuz
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
 6
nf
ysvchtjkfgsbyfzxjaykey
advqnf
wl
pi
ppppfvvmaebvhkoagppppp
 3
j
k
kkailgwqnxtdsttkkkkkkk
 4
o
yhnx
e
ennn
 10
j
dyfu
udzj
wwow
xtnw
f
c
q
o
gggg
 6
w
g
c
j
y
f
 4
r
o
w
wwwwwwwwww
 2
zxwp
ppppctfisvflhtjggg
 5
m
g
u
t
tttt
 2
n
nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn
 3
lt
en
eeeeeeeeee
 4
vr
hp
l
llbn

7 5 541 10 10 4 4 1 21 5 9 93 21 3
n = int(input())
S = []
for i in range(n):
    S.append(input(""))

Final =S[0]
for j in range(n-1):
    mid = ""
    for k in range(len(Final)):
                   mid = mid + S[j+1] + Final[k]
    mid = mid + S[j+1]
    Final = mid

##print(Final)
count = 1          
for l in range(len(Final)-1):
    temp = Final[l]
    if Final[l+1] == Final[l]:
        count = count+1

print(count)
