Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
35631	Moon Safari (Extreme)	2	9	21.28	42 42
36946	March Of The King	2	13	37.50	42 42
37420	Anti Hash	3	31	14.83	42 42
37422	Recurrence Power Sum	3	24	19.79	42 45
37921	Birthday Present	3	37	30.64	42 34
1470	Another Sequence Problem	3	186	24.42	43 27
6988	Beer Machines	5	32	18.72	43 37
780	The Archipelago		36	42.18	45 34
6622	Islands and Hotel Chains	2	61	9.54	45 34
7363	Tree Sum	4	149	33.90	45 50
18932	Sum of primes (reverse mode)	5	21	17.44	45 45
19954	Travelling Knight 2	3	16	13.77	45 34
33046	Factorial Modulo Prime	3	28	18.84	45 39
40501	A Simple Sieve	3	5	16.67	45 50
26045	GCD OF MATRIX (hard)	3	120	28.76	47 28
16063	Hackers	6	57	23.48	48 48
73	Bacterial	1	70	20.03	50 17
177	AB-words	1	16	1.30	50 50
1505	Whac-a-Mole	2	42	15.87	50 17
2161	Pixel Shuffle		29	19.57	50 17
2902	Candy IV		31	51.25	50 34
2946	Eclipse	1	24	10.92	50 50
3948	Polynomial Evaluation - Angry Teacher	-1	30	15.28	50 50
4100	Sum of Vectors	-1	101	32.12	50 34
4166	Four colors	1	100	21.88	50 50
4569	Let go to the movies	-3	159	18.60	50 34
5157	Game Simulator	1	17	4.57	50 17
5638	Mobile Service Hard	1	81	22.75	50 50
6408	Counting Triangles 2	-1	55	33.60	50 50
7192	Integral Maximization	1	369	38.14	50 50
7565	Another Sorting Algorithm	1	29	14.60	50 1
7583	Cubic Eight-Puzzle	1	24	28.93	50 34
7882	Tabovi	2	328	49.62	50 50
8283	Non-Decreasing Numbers	1	25	24.82	50 50
8318	color the balls		66	45.93	50 50
9519	Distinct Submatrices	1	23	20.74	50 50
9543	Dynamic Congruence Equation System		10	51.11	50 50
9638	Circuits		25	9.82	50 34
9889	Movie collection	1	212	43.29	50 50
9950	IQ Team		37	41.59	50 50
11756	Teaming up for the competition	1	30	32.86	50 50
12076	Longest Common Subsequence	5	119	4.19	50 50
12803	Graph		8	18.42	50 50
13094	Beggars		47	27.23	50 50
13223	The BrainFast Processing! Classical version		9	43.66	50 17
13591	Factor y Hell		9	23.91	50 34
13809	ISRANK	1	20	33.54	50 50
13940	Fibonacci vs Polynomial (HARD)	3	17	28.57	50 50
15257	Partition function (HARD)	1	6	2.93	50 42
15382	Factorial (Again!)		4	43.37	50 1

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