Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
32092	Chessboard State 3: Intergalactic Chess Tournament	1	6	61.22	50 34
32302	Ada and Replant	1	21	32.87	50 34
32952	Ada and Football	2	196	38.39	50 42
33039	Amazing Factor Sequence (hard)	2	17	61.42	50 50
33062	LCM Pesticide	1	6	30.00	50 50
35675	Primes in GCD Table (Hard)	2	9	30.77	50 50
36789	Linear Diophantine Equation	2	7	15.93	50 50
37446	Breaking Math	2	7	26.15	50 50
16063	Hackers	6	57	23.48	48 48
26045	GCD OF MATRIX (hard)	3	118	28.86	47 28
780	The Archipelago		36	42.18	45 34
6622	Islands and Hotel Chains	2	61	9.59	45 34
7363	Tree Sum	4	149	33.90	45 50
18932	Sum of primes (reverse mode)	5	21	17.44	45 45
33046	Factorial Modulo Prime	3	28	19.12	45 39
40501	A Simple Sieve	3	5	16.67	45 50
1470	Another Sequence Problem	3	186	24.42	43 27
6988	Beer Machines	5	32	18.72	43 37
3	Substring Check (Bug Funny)	8	1061	7.67	42 16
105	Alice and Bob	3	165	27.12	42 42
1433	The Sum	2	279	17.04	42 34
2023	One Instruction Computer Simulator		41	11.22	42 42
3314	Umnozak		102	29.03	42 17
3833	Tresnja	1	126	52.36	42 42
3902	Fight with functions	3	20	6.55	42 34
4157	Domino	4	54	50.42	42 42
6489	Finding the Kth Prime (Hard)	7	76	9.75	42 36
7356	Iterated Bitcount Function	2	36	17.72	42 34
7746	Cocircular Points		59	16.57	42 17
8075	Sequence	2	47	27.60	42 42
9985	Distance	2	61	24.14	42 34
11202	Number Theory	-1	32	31.05	42 34
11482	Count on a trie		46	29.66	42 50
13980	Sudoku goblin	2	72	40.92	42 34
15381	Cut The Rope		3	18.42	42 1
18522	Tours		22	13.10	42 26
19954	Travelling Knight 2	2	15	13.20	42 26
21858	Christmas is coming	2	27	13.38	42 26
22086	Prime Power Test	2	16	14.04	42 17
32088	Chessboard State 1: National Chess Tournament	5	11	28.10	42 21
32223	Ada and Lychees	3	14	27.37	42 26
33932	Ada and Prime	5	77	22.97	42 26
35631	Moon Safari (Extreme)	2	9	20.94	42 42
36946	March Of The King	2	13	37.50	42 42
37420	Anti Hash	3	31	14.85	42 42
37422	Recurrence Power Sum	3	24	19.79	42 45
37921	Birthday Present	3	37	30.64	42 34
9576	Dynamic Graph Connectivity	8	281	37.01	41 38
34096	Counting Divisors (general)	4	305	34.65	40 43
4948	Integer Factorization (29 digits)	8	100	15.84	40 34

list of classical problems

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