Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
34499	So Many Squares	4	22	29.86	39 39
36936	K-Divisors	3	10	18.21	39 39
38389	Phasmophobia	5	27	30.17	39 39
4948	Integer Factorization (29 digits)	8	102	15.52	40 34
34096	Counting Divisors (general)	4	325	35.12	40 43
9576	Dynamic Graph Connectivity	8	300	37.57	41 38
3	Substring Check (Bug Funny)	8	1068	7.42	42 16
105	Alice and Bob	3	172	27.50	42 42
2023	One Instruction Computer Simulator		41	11.22	42 42
3314	Umnozak		105	29.17	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
5703	Primes of Lambda	2	22	26.97	42 42
6489	Finding the Kth Prime (Hard)	7	82	10.07	42 36
7356	Iterated Bitcount Function	2	35	16.95	42 34
7561	Lexicographic position	1	33	33.86	42 26
7746	Cocircular Points		59	16.57	42 17
9985	Distance	2	61	24.14	42 34
11482	Count on a trie		60	23.63	42 50
11834	DOJO Corridor II	2	21	33.54	42 34
13980	Sudoku goblin	2	73	41.09	42 34
15381	Cut The Rope		3	17.95	42 1
18522	Tours		22	13.10	42 26
21858	Christmas is coming	2	27	13.38	42 26
22086	Prime Power Test	2	16	14.03	42 17
26045	GCD OF MATRIX (hard)	4	123	28.86	42 29
26561	Pair Divisible 2	2	15	8.33	42 42
32088	Chessboard State 1: National Chess Tournament	5	12	27.85	42 21
32223	Ada and Lychees	3	14	27.08	42 26
33048	Find Linear Recurrence	4	23	34.48	42 50
33932	Ada and Prime	5	78	22.93	42 26
35631	Moon Safari (Extreme)	2	9	25.00	42 42
37420	Anti Hash	3	34	15.25	42 42
37422	Recurrence Power Sum	3	25	19.51	42 45
37921	Birthday Present	3	37	30.64	42 34
40148	Distinct Cyclings	1	9	23.81	42 34
1470	Another Sequence Problem	3	191	24.49	43 27
6988	Beer Machines	5	32	18.72	43 37
6622	Islands and Hotel Chains	2	61	9.54	45 34
7363	Tree Sum	4	157	34.61	45 50
18932	Sum of primes (reverse mode)	5	21	17.44	45 45
19954	Travelling Knight 2	3	16	13.77	45 34
32952	Ada and Football	3	209	38.46	45 39
36946	March Of The King	3	13	32.61	45 45
40501	A Simple Sieve	3	6	13.64	45 50
33046	Factorial Modulo Prime	4	29	18.62	46 42
16063	Hackers	6	59	21.54	48 48
73	Bacterial	1	70	18.93	50 17
177	AB-words	1	16	1.30	50 50

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