checkers pattern

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Problem

Display the checkers pattern.

Options

exec is denied

now post-mortem time, all source codes will be revealed

Sample input:_

3 19

Sample output:

1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

Sample input:_

8 8

Sample output:

1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1

Sample input:_

21 30

Sample output:

1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0

Ranking

Ruby _

Rank	User	Size	Time	Date	Statistics
1	niha	53	0.2535	2008/02/27 03:01:12	1B / 19B / 31B
2	leonid	56	0.2034	2008/02/26 22:05:22	0B / 26B / 28B
3	shinh	59	0.0841	2008/02/27 01:27:12	0B / 30B / 25B
4	GooGoo+.	61	0.1642	2008/02/26 20:17:07	0B / 31B / 29B
5	flagitious	62	0.1265	2008/02/27 00:58:08	0B / 26B / 32B
6	eban	73	0.1612	2008/02/27 01:26:25	0B / 28B / 40B
7	tabasa	117	0.1178	2008/02/25 08:30:56	11B / 53B / 39B
8	kaki	71	0.0729	2008/07/17 17:00:03	0B / 41B / 27B
9	rochefort	96	0.1161	2008/03/16 02:58:44	3B / 48B / 40B

Perl _

Rank	User	Size	Time	Date	Statistics
1	Terje K	44	0.0553	2008/02/26 23:18:14	0B / 13B / 29B
2	Mithran	55	0.1227	2008/02/25 22:41:37	0B / 14B / 40B
3	skyvan	69	0.0840	2008/02/25 20:41:28	0B / ?B / ?B
4	ivanw	73	0.0314	2008/02/25 08:49:35	0B / ?B / ?B
5	%20(Terje K)	43	0.0381	2015/11/04 12:44:53	0B / 13B / 29B
6	BioFALSE	85	0.0450	2013/01/30 05:26:47	0B / 31B / 52B
7	jonathan camacho	205	0.0328	2014/07/23 11:30:17	0B / 56B / 72B

Python _

Rank	User	Size	Time	Date	Statistics
1	kt3k	75	0.0812	2008/02/25 04:27:27	0B / 38B / 33B
2	elb	76	0.1312	2008/02/26 22:20:09	0B / 42B / 31B
3	SeeNoEvil	77	0.2340	2008/02/29 17:38:43	0B / 43B / 30B
4	hirose	88	0.0982	2008/02/28 20:37:14	0B / 55B / 25B
5	rem	479	0.1121	2008/02/26 12:27:13	11B / ?B / ?B
6	kt3k	74	0.2132	2008/03/03 08:38:03	0B / 37B / 34B
7	Vim Lover	95	0.0931	2016/11/21 10:04:16	0B / ?B / ?B
8	potato	109	0.0853	2016/11/21 10:15:54	2B / ?B / ?B

PHP _

Rank	User	Size	Time	Date	Statistics
1	daira	102	0.4093	2008/02/27 12:05:26	0B / 41B / 58B
2	o-cn	86	0.0250	2010/01/02 00:09:46	0B / ?B / ?B
3	pooq	95	0.6749	2008/10/11 00:13:52	0B / 41B / 51B

Scheme _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	116	0.1153	2008/06/24 00:21:29	0B / 64B / 48B
2	kaki	141	0.2573	2008/05/16 10:28:48	0B / 82B / 51B
3	mushi	197	0.0925	2008/03/10 16:42:19	0B / ?B / ?B

Common LISP _

Rank	User	Size	Time	Date	Statistics
1	kozima	86	0.2232	2008/02/26 14:17:27	0B / 40B / 38B

Arc _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	76	11.0964	2009/10/11 13:43:37	0B / 35B / 31B
2	pooq	76	12.6274	2009/10/12 10:46:05	0B / 35B / 27B

Io _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	110	2.6115	2008/02/28 23:33:27	0B / 75B / 28B
2	pooq	113	2.8169	2008/02/27 12:09:27	0B / 80B / 28B
3	murky-satyr	109	2.7311	2008/06/25 21:33:18	0B / 73B / 30B

JavaScript _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	89	0.0781	2008/02/27 03:18:01	0B / 45B / 43B
2	murky-satyr	81	0.1933	2008/07/09 05:00:35	0B / 33B / 47B
3	nn	82	0.1176	2008/06/08 23:11:43	0B / 41B / 39B

Lua _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	86	0.0503	2008/06/04 06:13:56	0B / 48B / 31B

Tcl _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	125	0.0869	2008/07/09 05:31:06	0B / 71B / 30B

Xtal _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	93	0.2228	2008/02/27 11:54:21	0B / 52B / 39B

Smalltalk _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	129	0.4505	2008/02/27 04:08:35	0B / 71B / 46B
2	murky-satyr	123	0.4772	2008/07/09 06:53:08	0B / 61B / 56B

Forth _

Rank	User	Size	Time	Date	Statistics
1	51b	93	0.0606	2010/04/03 23:51:26	0B / 59B / 9B

BASIC _

Rank	User	Size	Time	Date	Statistics
1	yt	57	0.0925	2008/02/25 12:15:13	0B / 38B / 13B
2	pooq	69	0.0909	2008/02/25 20:09:30	0B / 41B / 18B

Erlang _

Rank	User	Size	Time	Date	Statistics
1	51b	153	1.0221	2008/02/25 22:51:22	0B / 79B / 70B
2	51b	151	1.3209	2008/06/26 21:13:08	0B / 74B / 73B

J _

Rank	User	Size	Time	Date	Statistics
1	pooq	24	0.3645	2008/02/27 18:33:16	0B / 9B / 14B
2	I., S.	22	0.1206	2012/03/11 07:07:07	0B / 9B / 13B
3	pooq	23	0.1261	2008/03/05 07:04:12	0B / 7B / 15B
4	medialuna	54	0.0692	2014/08/27 14:12:25	0B / ?B / ?B

K _

Rank	User	Size	Time	Date	Statistics
1	twobit	28	0.0269	2013/04/24 00:50:19	0B / 5B / 23B

iogii _

Rank	User	Size	Time	Date	Statistics
1	darrenks(#c0ffee)	9	0.0604	2025/07/12 00:59:01	0B / 8B / 1B
2	darrenks	9	0.0486	2025/07/12 01:17:01	0B / 7B / 2B
3	darrenks2	9	0.0514	2025/07/12 01:17:26	0B / 5B / 4B
4	#c0ffee	10	0.0507	2025/07/11 19:51:20	0B / 8B / 2B

C _

Rank	User	Size	Time	Date	Statistics
1	51b	84	0.0637	2008/02/25 15:29:11	0B / 42B / 42B
2	hinoe	84	0.0302	2008/02/27 19:35:10	0B / 42B / 42B
3	rem	149	0.0255	2008/02/26 12:19:46	1B / ?B / ?B
4	inaniwa	88	0.0011	2009/12/14 12:49:27	0B / 40B / 47B
5	takotako	143	0.0439	2008/03/12 18:21:56	0B / 71B / 70B

D _

Rank	User	Size	Time	Date	Statistics
1	51b	105	0.0487	2008/02/25 22:22:10	0B / 57B / 43B
2	51b	104	0.0482	2008/03/16 18:00:52	0B / 58B / 42B

OCaml _

Rank	User	Size	Time	Date	Statistics
1	m.ukai	110	0.1689	2008/04/10 18:14:57	0B / 68B / 28B

Haskell _

Rank	User	Size	Time	Date	Statistics
1	notogawa	92	0.0534	2008/02/26 22:33:56	0B / 49B / 35B
2	konn	106	0.0203	2008/02/28 21:21:01	0B / ?B / ?B

Ada _

Rank	User	Size	Time	Date	Statistics
1	D	155	0.0266	2008/02/25 19:32:22	0B / 102B / 36B
2	yt	159	0.1252	2008/02/25 12:24:26	0B / 105B / 39B

Java _

Rank	User	Size	Time	Date	Statistics
1	Undermined	605	1.0013	2008/03/01 05:52:53	1B / 399B / 125B
2	teebee	151	0.4538	2010/11/26 09:05:50	0B / 75B / 73B

Pascal _

Rank	User	Size	Time	Date	Statistics
1	yt	111	0.1118	2008/02/25 12:19:34	0B / 72B / 28B
2	uru	102	0.1341	2009/08/27 20:19:41	0B / 63B / 28B

Fortran _

Rank	User	Size	Time	Date	Statistics
1	pooq	97	0.0429	2008/02/28 12:43:34	0B / 57B / 29B
2	yuko	63	0.0468	2011/11/21 06:16:51	0B / 36B / 25B

Nemerle _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	120	1.2593	2008/11/10 10:46:10	0B / 64B / 50B

Maxima _

Rank	User	Size	Time	Date	Statistics
1	pooq	85	0.4220	2010/01/15 01:40:24	0B / 51B / 33B

Octave _

Rank	User	Size	Time	Date	Statistics
1	pooq	65	0.7126	2011/10/28 23:06:36	0B / 31B / 30B

Asymptote _

Rank	User	Size	Time	Date	Statistics
1	chocobi	108	3.5625	2009/04/11 00:09:08	0B / 61B / 44B

AWK _

Rank	User	Size	Time	Date	Statistics
1	Fleur	48	0.0457	2025/07/12 01:15:51	0B / 22B / 26B
2	Fleur (llhuii(yamaya))	52	0.0463	2021/12/23 10:20:13	0B / 24B / 28B
3	llhuii(yamaya)	53	0.0331	2014/07/23 22:51:32	0B / 25B / 28B
4	yamaya	54	0.0052	2009/12/16 02:56:54	0B / 26B / 28B
5	nn	57	0.0807	2008/10/05 01:44:40	0B / 25B / 29B

sed _

Rank	User	Size	Time	Date	Statistics
1	tails	124	0.0481	2012/04/11 16:01:12	0B / 47B / 53B
2	emoken	241	0.0941	2008/03/06 08:45:58	0B / 94B / 117B

jq _

Rank	User	Size	Time	Date	Statistics
1	teebee(eban)	65	0.0335	2014/12/19 22:53:19	0B / 33B / 31B
2	eban	66	0.0388	2014/12/19 22:16:29	0B / 33B / 32B

Bash _

Rank	User	Size	Time	Date	Statistics
1	eban	86	0.3140	2008/03/02 21:59:33	24B / 38B / 17B
2	tails (yamaya)	45	0.0282	2016/11/21 14:02:54	0B / 21B / 19B
3	yamaya	49	0.0672	2010/10/31 14:38:13	0B / 22B / 22B

Bash (builtins) _

Rank	User	Size	Time	Date	Statistics
1	tails	53	0.0360	2016/11/21 14:35:53	0B / 23B / 25B

bc _

Rank	User	Size	Time	Date	Statistics
1	teebee(Carlos Gutierrez)	68	0.0061	2011/07/05 05:17:39	0B / 28B / 38B
2	Carlos Gutierrez	84	0.0032	2010/03/16 15:44:30	0B / 41B / 39B

dc _

Rank	User	Size	Time	Date	Statistics
1	tails	52	0.0566	2012/03/11 21:31:47	0B / 39B / 13B

Postscript _

Rank	User	Size	Time	Date	Statistics
1	yshl(bin)	51	0.5592	2008/02/25 04:50:54	22B / 20B / 8B
2	yshl	91	0.5598	2008/02/25 04:50:44	0B / 67B / 12B

R _

Rank	User	Size	Time	Date	Statistics
1	pooq	60	3.8993	2008/04/13 20:13:46	0B / 30B / 29B
2	51b	60	4.6171	2008/06/08 18:02:51	0B / 32B / 25B

Brainfuck _

Rank	User	Size	Time	Date	Statistics
1	nuko	406	0.0618	2008/02/25 05:34:57	0B / 0B / 406B

Befunge _

Rank	User	Size	Time	Date	Statistics
1	yzx	43	0.1184	2008/02/26 12:20:38	0B / 10B / 31B

GolfScript _

Rank	User	Size	Time	Date	Statistics
1	irori	20	0.3720	2008/02/25 01:48:25	0B / 2B / 17B
2	kt3k	23	0.3022	2008/02/25 04:46:03	0B / 6B / 16B
3	flagitious	23	0.8968	2008/02/27 01:53:12	0B / 2B / 20B
4	whio	20	0.0642	2015/11/04 04:26:45	0B / 3B / 16B

gs2 _

Rank	User	Size	Time	Date	Statistics
1	whio	14	0.2501	2017/03/15 00:46:25	6B / 3B / 5B

Nibbles _

Rank	User	Size	Time	Date	Statistics
1	tails	6	0.0488	2022/01/13 18:58:01	4B / 1B / 1B

FlogScript _

Rank	User	Size	Time	Date	Statistics
1	milieu	21	0.5589	2010/08/20 03:12:10	0B / ?B / ?B

Burlesque _

Rank	User	Size	Time	Date	Statistics
1	Hendrik	16	0.0591	2014/05/05 16:13:07	0B / 12B / 4B

Unlambda _

Rank	User	Size	Time	Date	Statistics
1	irori	385	0.1068	2008/02/29 11:09:01	0B / 186B / 197B
2	irori	331	0.1321	2008/03/15 17:04:44	0B / 159B / 170B

Vim _

Rank	User	Size	Time	Date	Statistics
1	udioica	38	0.0501	2016/11/30 19:24:48	2B / ?B / ?B
2	nn	40	0.0882	2009/12/13 00:13:12	2B / 30B / 6B
3	eban	42	0.3833	2008/03/10 16:29:18	2B / 33B / 5B

goruby _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	39	0.0951	2010/01/04 15:41:59	0B / 10B / 27B
2	leonid	40	0.5753	2008/12/15 21:12:27	0B / 10B / 29B

Groovy _

Rank	User	Size	Time	Date	Statistics
1	murky-satyr	89	9.9154	2008/02/27 04:28:35	0B / 49B / 36B
2	hoozie	112	10.3048	2008/02/29 04:30:03	0B / 74B / 34B
3	nn	83	9.6412	2009/05/03 21:50:00	0B / 47B / 34B

Language Ranking_

Rank	Lang	User	Size	Score
1	Nibbles	tails	6	10000
2	iogii	darrenks(#c0ffee)	9	6666
3	gs2	whio	14	4285
4	Burlesque	Hendrik	16	3750
5	GolfScript	irori	20	3000
6	FlogScript	milieu	21	2857
7	J	I., S.	22	2727
8	K	twobit	28	2142
9	Vim	udioica	38	1578
10	goruby	murky-satyr	39	1538
11	Befunge	yzx	43	1395
12	Perl	%20(Terje K)	43	1395
13	Bash	tails (yamaya)	45	1333
14	AWK	Fleur	48	1250
15	Postscript	yshl(bin)	51	1176
16	dc	tails	52	1153
17	Ruby	niha	53	1132
18	Bash (builtins)	tails	53	1132
19	BASIC	yt	57	1052
20	R	pooq	60	1000
21	Fortran	yuko	63	952
22	Octave	pooq	65	923
23	jq	teebee(eban)	65	923
24	bc	teebee(Carlos Gutierrez)	68	882
25	Python	kt3k	74	810
26	Arc	murky-satyr	76	789
27	JavaScript	murky-satyr	81	740
28	Groovy	nn	83	722
29	C	51b	84	714
30	Maxima	pooq	85	705
31	Common LISP	kozima	86	697
32	Lua	murky-satyr	86	697
33	PHP	o-cn	86	697
34	Haskell	notogawa	92	652
35	Xtal	murky-satyr	93	645
36	Forth	51b	93	645
37	Pascal	uru	102	588
38	D	51b	104	576
39	Asymptote	chocobi	108	555
40	Io	murky-satyr	109	550
41	OCaml	m.ukai	110	545
42	Scheme	murky-satyr	116	517
43	Nemerle	murky-satyr	120	500
44	Smalltalk	murky-satyr	123	487
45	sed	tails	124	483
46	Tcl	murky-satyr	125	480
47	Erlang	51b	151	397
48	Java	teebee	151	397
49	Ada	D	155	387
50	Unlambda	irori	331	181
51	Brainfuck	nuko	406	147

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