AOJ 2107 Can I go there?

Solved Users (link to submissions)
aicabod
amano
anonyanony
arrows
asi1024
atetubou
aweshin
blue_jam
climpet
cos
c_tori
dai1741
Darsein
drafear
dr_ken
ee67052
eha
ei1333
emk
flowlight
fura2
furaga
ganahakun
garasubo
hadrori
hama_du
hfukuda
hogloid
hs484
Huziwara
hydrogen
ichirin
ichyo
ids_mats
ikk
inuhiroshi
IOR
ir5
ishikado
japlj
johnsmith
kaguyama
kaneko
kazunetakahashi
kioa
kishii
kmcyuma
kmc_nakano
kn2423
koba2adc
kohyatoh
komiya
koudai
Kurorororo
kyuridenamida
k_operafan
lan
latte0119
Lepton_s
lpha
lyrically
mamekin
masato
Matts966
mfmi
mikemike
mimikyu
minoki
mio_h1917
mitaki28
Mi_Sawa
mmck0328
mondatto
monolith
mugury
murakami
nadeko
namonakiaccount
naoto172
natrium11321
ne220081
neoconservative
nisshy
NNever
no15_renne
no_name
okaoka
omochana1
orpheus
osa_k
otaks21
oxy
paruki
phi_ut
piroz
primenumber
prpr
qnighy
QtaroKujo
rankalee
rapi_376
Respect2D
rheuz
rng_58
roxion1377
ryoga
s1140147
s1150092
s1190048
s1190170
s1210207
s12ti009
sarasouju
semiexp
SGI
sh19910711
shioshiota
shiratty8
shuyoko
sigma
stqn
sugi2358
suibaka
sumino
sune2
t6w
taskie
the_moai34
tnakao
tokoharu
Tomoki_Imai
tomoya
tonkotsu
tozangezan
trinitrotoluene
tsubu
ukuku09
ustimaw
Utas_kun
uwi
wotsushi
wxcs
yaquc
yey177
yudedako
yukim
zeptometer
_n_ari