Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
5317	Tetravex Puzzle	2	283	46.24	23 6
6665	Easy Longest Common Substring	2	148	23.04	23 17
7250	Blocks for kids	2	101	40.40	23 23
7322	Prime Pattern	1	96	35.98	23 17
7753	Happy Numbers II	3	650	15.93	23 17
8263	Big Pyramid	3	48	61.63	23 23
8277	Number of Prime Strings	3	102	19.91	23 28
9138	Pyramid Sums 2	2	113	33.47	23 34
9255	Publication	3	42	61.61	23 17
9547	Counting d-pairs	2	137	30.38	23 28
10405	Shooting the balloons!	11	342	35.86	23 27
10606	Balanced Numbers	9	627	28.71	23 17
11789	Aliens at the subway	2	76	17.90	23 23
12318	My Reaction when there is no internet connection		31	25.56	23 12
12352	HNumbers	2	201	27.50	23 42
13044	Dyslexic Gollum	3	123	29.16	23 28
13048	Escape from the Mines	2	69	24.31	23 23
13106	KOSARE	3	364	50.52	23 39
13925	ZEROES IN RANGE V2	2	245	38.01	23 17
14122	Inverse of Recurrence Problem With a Square Root	3	61	49.03	23 45
14823	Advanced Battleships	5	51	13.59	23 23
14862	Union Laser	3	31	47.34	23 17
15143	play with prime numbers (I)	5	35	17.38	23 23
15243	Primos Quest	1	174	38.39	23 23
15551	Do You Even Lift	2	23	36.75	23 28
15557	Partition the sticks	4	109	34.85	23 17
15914	Update Sub-Matrix & Query Sub-Matrix	2	89	34.91	23 28
17406	Cheating a Boolean Tree	5	124	35.73	23 15
17660	The Bridge to Home	5	121	36.04	23 34
18153	Robert Langdon & The Rule of Three	3	40	36.17	23 34
18458	Very Friends 2	4	39	19.21	23 23
18468	A Pleasant Stroll	10	137	35.30	23 19
19146	Glorious Gamblers	-1	141	55.66	23 26
19152	Digo Goes Training	1	238	46.01	23 17
21353	Avantgarde and Doughnut	5	22	44.16	23 31
21861	I Love Strings	3	55	18.12	23 23
21966	Ricochet Robots	3	25	49.25	23 12
22268	Euler Totient Function Sieve	28	392	19.22	23 20
22270	Periodic function, trip 2	3	37	44.39	23 28
23875	Another Version of Inversion	7	69	31.75	23 23
25889	Drawing Lines	3	35	21.18	23 17
26017	GCD OF MATRIX	2	327	41.08	23 34
26954	k Alternating Sum	11	77	31.86	23 26
27218	Segmentation	6	35	39.87	23 28
27301	2D arrays with XOR property	4	13	27.14	23 39
27496	Again Eid Salami	3	127	45.52	23 34
28632	Ghost Town	11	285	41.00	23 10
30826	Bernoulli numbers	4	7	15.97	23 12
30828	Class Leader	3	215	11.59	23 28
32059	Ada and Taxes	16	111	36.51	23 23

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