Spiralia
Statement
A message is encoded in a square [[N]] by [[N]] grid. The first character of the message is in the top-left corner of the grid and the remaining characters are placed in the grid in an inwards clockwise spiral pattern.
Decode the message.
Input description
<<Line 1:>> One integer [[N]], the side length of the square grid.
<<Next [[N]] Lines:>> [[N]] characters on each line.
Output description
<<Line 1:>> The decoded message.
Constraints
1 ≤ [[N]] ≤ 25
Game modes
Fastest, Reverse
Test cases
CodinGame Test
Input
3
Cod
mei
aGn
Output
CodinGame
Validator 1 Validator
Input
3
!@#
*($
&^%
Output
!@#$%^&*(
Who Am I? Test
Input
4
[VE_
ERNF
D]EO
YRBR
Output
[VE_FORBRYDERNE]
Validator 2 Validator
Input
4
[VE_
FORB
RYDE
RNE]
Output
[VE_BE]ENRRFORDY
Symbols Test
Input
7
#-----+
+----+|
|+--+||
||+#|||
||+-+||
|+---+|
+-----+
Output
#-----+|||||+-----+||||+----+|||+---+||+--+|+-++#
Validator 3 Validator
Input
10
!"#$%&()*+
FGHIJKLMN,
EbcdefghO.
DavwxyziP/
C`uXXX{jQ0
B_tX X|kR1
A^s-'~}lS2
@]rqponmT3
?\[ZYXWVU4
>=<;:98765
Output
!"#$%&()*+,./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~'-XXXXX
Quaint Test
Input
1
X
Output
X
Validator 4 Validator
Input
2
AB
DC
Output
ABCD
Zimmermann Test
Input
9
We intend
submari
dill kent
ew. neeeo
t Sl.up
ce.art wb
iWU ehtae
r .erafrg
tsernu ni
Output
We intend to begin unrestricted submarine warfare. We will keep the U.S. neutral.
Validator 5 Validator
Input
9
We intend
to begin
unrestri
cted subm
arine war
fare. We
will keep
the U.S.
neutral.
Output
We intendnimr p..lartuen wfac to begirbaeeS.U ehtiartunrestuwWek llried s .ene
Secret of Psalm 46 Test
Input
25
You're spending too much
If you're finished writit
essage that I have intni
.mhis message. Do not egm
e te nothing to offerwn e
ds vipher here. It's aty
oigacd ciphers wher ynior
chnh ivery word anenodoue
ti ope is fillerd ouenra
e dsnu sns exact yt.ra d
tnad tmiind twelsso lci
iienysohaaharanyotuaJilon
rhral rTt cs!ct r unydg
wt llef nd retystitss e
ip as .oeevif-ihnakttp,t
dwoeuorrcrdnuh xegki hu h
n tsthee egassem epsetpi
atSectthtegot meht os ls
e ha tel tsrif ehtc eie
sr.t fo eno ro rehpiy nat
ics si ereht ,wonk uod se
heurof ,setsaw etalosehes
tsoires gnieb ma I .ere t
on si erehT .ti timbus
gnidaer potS !tuptuo esac
Output
You're spending too much time reading this test case output! Stop reading this and write code. If you're finished writing your code, please submit it. There is no secret within this message that I have intentionally put in here. I am being serious. Stop reading this message. Do not wander in these desolate wastes, for these lands have nothing to offer you. Just so you know, there is actually no cipher here. It's not a skip cipher or one of those stupid ciphers where you take the first letter from every word and string them together. This is filler so the message contains exactly six hundred and twenty-five characters!
Validator 6 Validator
Input
24
3.1415926535897932384626
534211706798214808651324
211055596446229489549383
821456485669234603486023
459817488152092096281338
380865213841469519420803
039563819326117931194162
891547575272489120525967
210101824406566425154649
602321867371907371143475
871686134277050091602400
927088532062932838096292
902641372771391685916838
815652765317127014474888
046009639490689288318144
281030533649493130352041
623753989219491107031969
808805472699732644563707
257539195957563072743591
646431100630952987639656
078273721419420627063659
417332846574821644339503
611848218049535271322859
187032954494790285015739
Output
3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931
Solution language
Solution
Stub generator input