Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
10453	Spring Loaded	-2	158	33.25	17 34
10547	Delivery Route	5	50	19.73	34 34
10572	Cheating on the contest	1	24	6.04	17 34
10605	Counting Formations	2	14	57.50	34 34
10612	Funny Areas	3	89	32.79	34 34
10699	Symmetry	1	26	36.63	17 34
10704	The Great Escape	1	33	28.73	34 34
10931	Online Bridge Searching	4	90	35.30	34 34
11202	Number Theory	-1	31	31.03	42 34
11267	Arnook Defensive Line	1	38	27.57	34 34
11274	Lights and Switches	1	57	33.46	17 34
11334	Lucifer Sort		7	7.26	34
11345	lcm addition	2	68	30.74	34 34
11414	Combat on a tree	2	216	29.89	30 34
11469	Balanced Cow Subsets	5	333	22.63	37 34
11575	A Famous Equation	2	71	28.14	34 34
11707	Wrong directions	2	43	31.49	39 34
11834	DOJO Corridor II	1	20	33.76	34 34
11901	Paths in a Tree	1	18	32.14	1 34
11946	Zig-Zag Permutation 2	1	5	39.29	26 34
12007	Fibonaccibonacci (easy)	1	103	29.58	1 34
12009	Fibonacci recursive sequences (hard)	2	23	9.73	34 34
12107	All Possible Barns	1	32	27.89	34 34
12370	Generating Alien DNA	1	31	18.18	34 34
12371	High Mountains		41	17.20	34 34
12436	The One-Dimensional Pool Table	1	57	40.87	1 34
12562	Glory War	2	33	35.20	34 34
12609	Different Vectors	3	43	42.17	26 34
12749	Dynamic Assignment Problem	1	12	56.63	34 34
12855	Teleport		4	16.22	17 34
12908	Binary Matrix		14	11.06	34 34
13031	Vision Field		27	23.89	34 34
13041	The Black Riders	6	186	40.37	17 34
13050	Entmoot	1	78	28.96	17 34
13051	Wormtongues Mind	3	67	51.26	17 34
13150	Magic Sticks	1	17	32.37	34 34
13419	Modular Fibonacci Period	8	81	25.26	34 34
13500	Discord is at it again	2	34	41.77	34 34
13591	Factor y Hell		9	23.91	50 34
13592	Expected Time to Love	1	39	17.39	17 34
13801	Dexter Rank	1	9	12.64	34 34
13806	Chaos In Arkham	1	48	18.57	1 34
13833	Super Borboletas World	1	6	33.33	34 34
13948	Disjoint Subtrees		19	48.80	34 34
13953	Divide Polygon (HARD)	1	17	22.35	34 34
13977	Thousands ByteMan March	3	24	43.36	34 34
13980	Sudoku goblin	2	72	40.92	42 34
14864	Sales	1	21	31.03	34 34
14893	Good Inflation	16	188	28.20	30 34
14924	King Graffs Tolls	3	31	40.00	34 34

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