Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
73	Bacterial	1	70	21.12	50 17
177	AB-words	1	16	1.31	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	10.75	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	79	22.39	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
7882	Tabovi	2	327	49.56	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		9	51.16	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	4.20	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)	2	16	30.07	50 50
15257	Partition function (HARD)	1	6	2.93	50 42
15382	Factorial (Again!)		4	43.37	50 1
17396	Dazzling Pearls		16	20.22	50 17
17402	Joy of Arbitrage	1	13	12.20	50 34
18915	Anils Proposal	2	26	18.54	50 50
19133	Base Conversion	1	9	15.60	50 34
20167	Array with Hudai Calculation		46	23.92	50 50
20327	Triangles	1	28	27.33	50 50
21061	Yet Another Subset Sum Problem	2	44	45.09	50 50
21395	Ohani And Binary Search Tree	-1	126	36.27	50 17
22090	Prime Power Test (Hard)		11	21.80	50 50
22331	Intersection Query	1	13	17.21	50 34
22741	Another Valentine Maze Game (2D)	2	9	27.18	50 34
26845	Daenerys wants to Conquer	1	6	48.15	50 50
30945	Non Coprime Sequences	2	20	21.08	50 50
31756	The Idol		13	19.18	50 34
31975	Ada and Scarecrow		14	16.86	50 50
32028	Ada and Parties		3	1.38	50 50
32091	Chessboard State 2: International Chess Tournament	1	6	20.00	50 17

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