Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
8073	The area of the union of circles	1	442	20.48	38 30
19301	Operators (new ver)	3	40	6.54	38 17
21640	Nested Palindromes	2	25	20.81	38 38
25458	Boxes	4	96	38.00	38 38
34118	Prime Pesticide	5	21	19.21	38 34
6779	Can you answer these queries VII	17	1187	19.32	38 27
2666	Query on a tree IV	5	681	13.68	38 34
5542	Counting pairs	4	129	26.33	39 36
8075	Sequence	3	57	27.73	39 39
8820	Okret	3	40	19.42	39 34
9687	Xavier is Learning to Count	1	31	18.55	39 39
10354	Count Strings	3	17	7.98	39 39
10820	Obsession	4	32	23.98	39 39
11202	Number Theory		32	31.12	39 39
11707	Wrong directions	2	45	31.05	39 34
12908	Binary Matrix	1	14	8.29	39 34
13829	Tjandra 19th birthday present (HARD)	2	36	38.02	39 23
15165	primes triangle (II)	2	18	31.50	39 17
15336	Hello Intercal!	2	169	59.31	39 17
17125	Thor vs Frost Giants	1	187	28.90	39 28
19975	Amazing Prime Sequence (hard)	5	81	41.88	39 45
26073	Counting Divisors	3	118	24.98	39 34
34499	So Many Squares	4	22	29.86	39 39
36936	K-Divisors	3	10	18.39	39 39
38389	Phasmophobia	5	26	29.82	39 39
4948	Integer Factorization (29 digits)	8	100	15.64	40 34
34096	Counting Divisors (general)	4	316	35.01	40 43
9576	Dynamic Graph Connectivity	8	289	37.31	41 38
3	Substring Check (Bug Funny)	8	1065	7.54	42 16
105	Alice and Bob	3	166	27.04	42 42
1433	The Sum	2	279	16.95	42 34
2023	One Instruction Computer Simulator		41	11.22	42 42
3314	Umnozak		104	29.08	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	77	9.69	42 36
7356	Iterated Bitcount Function	2	36	17.72	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
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
21858	Christmas is coming	2	27	13.38	42 26
22086	Prime Power Test	2	16	14.04	42 17
26561	Pair Divisible 2	2	15	8.33	42 42
32088	Chessboard State 1: National Chess Tournament	5	12	27.85	42 21

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