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Is there some kind of famous algorithm for this problem witch solves it the most efficient way? Like the

Thanks Ghust_omega!

I remade my input algorithm to look like yours and I got Presentation Error (Accepted). Then after some work with the new lines in my output algorithm I got accepted . I didn't touch my algorithm that solves the problem so it was al about the input algorithm.

I often have ...

Please post your result for this input. (If you have a AC code that is :) )

INPUT
10

E
AB
CE
DB
EC

Z
AB
CF

A
ZY
WS
PQ

D
AA
BB
CC
DD

E
AB
BA
AB
BA

Z
AB
BC
CD
DE
EF
FG
GH
HI
IJ
JK
KL
LM
MN
NO
OP
PQ
QR
RS
ST
TU
UV
VW
WX
XY
YZ

A

M

Z

I
AI
BI
CI
DI
IE
IF
IG
IH

My WA code output, and ...

I am getting WA on this problem. Can someone with a AC code try the input on the next post and share the result with us who needs it :roll: ?
My code is generating 2 new lines when it outputs the last case, could that be the error?
[edit] (code link removed, got accepted) [/edit]
I'm new to C ...