Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
34117	Just a Palindrome	1	29	8.76	34 34
34118	Prime Pesticide	6	25	16.83	37 34
34352	Cake Walk	3	54	38.89	34 34
34374	Samvel and Boxes	4	55	31.29	34 34
34409	Disconnected country	1	49	22.20	34 34
34973	Yet Another Subset Sum Problem	2	4	2.56	26 34
35088	A Complex Cone	4	58	22.46	26 34
35277	DNA of Elf	3	20	31.30	17 34
35278	Earth Sled Tour	5	31	28.77	34 34
35287	Magical Matrices	1	1	1.01	17 34
35337	Faketorial Hashing	2	15	10.63	34 34
36144	The Cow Gathering	2	38	26.74	17 34
36387	Honest Rectangle	1	23	34.19	17 34
36538	Learn You a Haskell for Great Good!	1	11	30.23	34 34
36671	Bipartite Permutation (Hard)	6	52	16.43	32 34
36718	Fashionable self-describing numbers	6	51	17.33	30 34
36937	Random Magic Trick	5	19	41.18	26 34
36941	AND Queries	4	22	30.94	23 34
37226	Recursive Sequence (Version III)	4	11	18.31	34 34
37380	Acronym	4	34	24.32	30 34
37443	Acronym II	4	30	15.05	34 34
37921	Birthday Present	3	41	32.41	42 34
40016	Robot World	2	72	11.84	34 34
40148	Distinct Cyclings	1	15	26.56	42 34
40192	Battle Of The Bastards - Kings Vs Rooks	3	18	26.88	34 34
40457	Mines of Moria	3	20	31.25	28 34
40636	Stacks of boxes	2	54	29.96	26 34
40643	The Revenge Of Anti Hash	1	13	18.64	34 34
41890	Anagrams and Divisibility	1	9	5.17	34 34
15648	Commando	26	869	33.51	27 34
1557	Can you answer these queries II	26	1790	25.05	28 35
19543	Can you answer these queries VIII	8	216	26.27	37 35
6717	Two Paths	9	231	17.81	34 36
2051	Cell Phone	4	161	31.43	28 36
5542	Counting pairs	4	135	26.54	39 36
22549	Divisors of factorial (extreme)	5	96	26.15	34 36
37514	A Summatory (Extreme)	5	49	22.91	34 36
6988	Beer Machines	5	33	17.36	43 37
8550	Longest Square Factor	5	75	18.47	21 37
18186	Machine Mayhem	4	15	28.17	34 37
34499	So Many Squares	6	27	23.76	34 37
37114	PermRLE	4	15	28.33	27 37
32222	Ada and Panels	8	71	43.88	27 37
687	Repeats	2	982	25.39	30 38
1479	The GbAaY Kingdom	1	136	19.18	30 38
6489	Finding the Kth Prime (Hard)	6	95	10.45	38 38
14905	Zig when you zag	4	37	30.30	30 38
21640	Nested Palindromes	2	28	17.99	38 38
25458	Boxes	4	98	38.02	38 38
26073	Counting Divisors	3	143	25.82	42 38

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