Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
12803	Graph		8	18.42	50 50
15381	Cut The Rope		3	18.42	42 1
37443	Acronym II	4	28	18.41	34 34
3752	JEDNAKOST	12	595	18.40	23 21
1442	Strange Food Chain	19	766	18.37	22 25
7599	Optimal Strategy for the ICPC		8	18.37
14542	Pythagorean triples (medium)	2	130	18.36	9 26
1454	Memory Distribution		20	18.35
12958	Another Gift Problem		35	18.33
25283	ChickenLove	5	187	18.33	15 20
27378	Legend of Heta	2	62	18.33	28 28
34551	Stopping-off Cities	6	66	18.31	26 23
12916	MMM	3	79	18.31	21 26
3643	Traffic Network	89	2088	18.30	18 21
32683	Ada and Kohlrabi	5	67	18.28	30 13
34910	Easy Math	2	590	18.26	2 4
7155	Test	10	362	18.26	34 27
38365	Asacoco Prescription	2	42	18.25	17 26
3107	Odd Numbers of Divisors	27	1039	18.24	22 22
35954	New Data Type		118	18.23	8 8
3106	Dictionary Subsequences	3	162	18.20	17 17
5672	Captain Selection		2	18.18
12004	Cousin Wars	2	32	18.18	26 26
12370	Generating Alien DNA	1	31	18.18	34 34
26183	Laser Beam 2.0	1	4	18.18	17 17
26893	Pristojba	2	16	18.18	26 50
30351	Quest Hunter		10	18.18
33049	Ada and Chess	5	38	18.18	26 17
6956	IOI2009 Mecho	3	159	18.12	28 23
3983	Right Triangle Counting	3	188	18.12	30 21
21414	Count The Indexes 2	5	41	18.11	37 24
13886	BLOCK_D SOLVER	2	17	18.10	17 26
4003	Subway planning		40	18.08
9516	XOR Equations		14	18.07
413	Word Puzzles	4	364	18.07	30 14
10877	Decoys and Diversions		45	18.03	9 17
4421	Irreducible polynomials over GF2		62	18.01
4305	Drilling	3	96	18.01	17 34
700	Branch Prediction		74	18.00
12807	Recursive Sequence (Version X)		7	18.00
18666	Radiation	1	29	18.00
5511	Heavy Sequences		79	18.00	34 34
7232	Inversion Sort	5	152	17.99	32 23
2511	Magic Program IV		27	17.99
23541	CWC-2015	8	142	17.93	17 17
36671	Bipartite Permutation (Hard)	6	51	17.91	32 34
26721	I LOVE Kd-TREES III	4	77	17.91	34 34
34357	Ludic Numbers (hard)	2	4	17.91
7563	Hi6		37	17.90	26 26
18393	Hamiltonian Cycles	1	25	17.89	17 17

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