OJ Board

the problem was with endl

INPUT

879
I O G L X X
C O V U R U
P T H Y S H
G C I N O N
P B I M C I
G P X U F F
N K Q P G P
D Q F Y R R
N R M H E M
B T U H V B
T P W R N W
U D Q V I I
L C D G O D
Y P J Q B Q
W F H Z E E
S Y W G P S
S P N H Q Q
J R Z K E J
M B Z W X B
K N J X O X
Q K M I R Q
E K X O Q X
X ...

INPUT:

85
M F G Y Q G
M J H I L L
H D M J G H
E G Y Z J G
F L W B N W
P B T Q X P
O G R L B R
I P X Q U I
M I S N V M
X F I Y U X
C I W Z Q C
N H Z O L O
Y V S B W Y
Y N U K I U
X S U F D D
S E B D P D
Z T U V M U
S X R W G X
Y G R W I G
G K H R X R
N I W P S P
E L W R Y R
M ...

i also getting WA, have you any test cases.
Could you check your code for:
INPUT:

36
I O Z G K K
S J R C E J
Y J H N K N
Y B C L V B
B M P I D M
V O M I R I
D Y L C I Y
O I F M J J
X Y D V O X
U T L B Z B
J C E P O O
U K B J D B
I F P B E I
P V D I H H
X D E I U E
G K I P S I
O X M ...