Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
4839	Ant	3	190	39.06	23 28
6665	Easy Longest Common Substring	2	145	22.98	23 17
7019	Zig-Zag rabbit	4	587	36.87	23 17
7250	Blocks for kids	2	96	43.87	23 23
7258	Lexicographical Substring Search	30	2104	21.81	23 19
7322	Prime Pattern	1	94	36.31	23 17
7753	Happy Numbers II	3	647	15.91	23 17
8222	Substrings	6	1243	29.38	23 26
8263	Big Pyramid	3	45	59.76	23 23
8277	Number of Prime Strings	3	91	18.95	23 28
9138	Pyramid Sums 2	2	106	33.85	23 34
9255	Publication	3	38	61.63	23 17
9547	Counting d-pairs	2	135	30.67	23 28
10405	Shooting the balloons!	11	329	35.75	23 27
10606	Balanced Numbers	9	539	26.67	23 17
11789	Aliens at the subway	2	67	17.03	23 23
12318	My Reaction when there is no internet connection		29	24.62	23 12
12352	HNumbers	2	200	27.38	23 42
12366	Cantor	8	199	46.20	23 23
13044	Dyslexic Gollum	3	122	29.11	23 28
13048	Escape from the Mines	2	67	24.08	23 23
13106	KOSARE	3	304	48.76	23 39
13925	ZEROES IN RANGE V2	2	240	37.60	23 17
14122	Inverse of Recurrence Problem With a Square Root	3	59	49.56	23 45
14823	Advanced Battleships	5	50	13.53	23 23
14862	Union Laser	3	31	48.55	23 17
15243	Primos Quest	1	171	39.87	23 23
15551	Do You Even Lift	2	18	38.35	23 28
15557	Partition the sticks	4	106	34.56	23 17
15914	Update Sub-Matrix & Query Sub-Matrix	2	76	33.53	23 28
17406	Cheating a Boolean Tree	5	113	35.28	23 15
17660	The Bridge to Home	5	115	34.96	23 34
18153	Robert Langdon & The Rule of Three	3	35	34.59	23 34
18458	Very Friends 2	4	38	19.93	23 23
18468	A Pleasant Stroll	10	134	35.01	23 19
19146	Glorious Gamblers	-1	136	56.86	23 26
19152	Digo Goes Training	1	227	45.74	23 17
21861	I Love Strings	3	52	18.70	23 23
21966	Ricochet Robots	3	17	52.17	23 12
22268	Euler Totient Function Sieve	28	377	18.94	23 20
22270	Periodic function, trip 2	3	33	53.57	23 28
25889	Drawing Lines	3	31	20.16	23 17
25959	Next Lexicographically Greater Substring	4	43	21.43	23 23
26017	GCD OF MATRIX	2	273	39.52	23 34
26954	k Alternating Sum	11	73	33.07	23 26
27218	Segmentation	6	35	41.50	23 28
27301	2D arrays with XOR property	4	14	43.48	23 39
27496	Again Eid Salami	3	126	45.54	23 34
27942	Product it again	5	126	31.28	23 17
28632	Ghost Town	11	267	40.73	23 10

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