Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
7322	Prime Pattern	1	94	36.31	23 17
7753	Happy Numbers II	3	647	15.91	23 17
8222	Substrings	6	1229	29.30	23 26
8263	Big Pyramid	3	45	59.76	23 23
8277	Number of Prime Strings	3	87	18.91	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	134	30.81	23 28
10405	Shooting the balloons!	11	328	35.96	23 27
10606	Balanced Numbers	9	512	26.08	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	29.14	23 28
13048	Escape from the Mines	2	67	24.08	23 23
13106	KOSARE	3	285	47.83	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	49	13.42	23 23
14862	Union Laser	3	31	48.55	23 17
15243	Primos Quest	1	171	39.93	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	74	33.33	23 28
17406	Cheating a Boolean Tree	5	111	35.78	23 15
17660	The Bridge to Home	5	115	34.96	23 34
18153	Robert Langdon & The Rule of Three	3	36	35.34	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	51	17.40	23 23
21966	Ricochet Robots	3	18	53.33	23 12
22268	Euler Totient Function Sieve	28	375	18.91	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	42	21.21	23 23
26017	GCD OF MATRIX	2	265	39.30	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	120	30.86	23 17
28632	Ghost Town	11	265	40.65	23 10
30826	Bernoulli numbers	4	7	20.00	23 12
30828	Class Leader	3	190	12.93	23 28
32059	Ada and Taxes	16	103	37.23	23 23
32595	Ada and Servers	2	22	20.59	23 1
35196	Pandas are the best Lovers	6	23	47.19	23 23

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