Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
2139	Gossipers	3	602	31.76	21 26
2140	(un)Fair Play		75	38.08
2141	Golden Garden		17	12.20
2142	Arranging Flowers		25	9.87
2143	Dependency Problems	4	521	38.96	17 13
2144	K Edge-disjoint Branchings		9	12.39
2147	Root of a Linear Equation		66	8.90	34 17
2148	Candy III	54	20552	25.33	9 5
2149	Biased Standings	21	3678	33.66	5 5
2150	Counting Subsequences	13	1031	29.42	9 13
2151	Digital Calculator		23	5.69
2152	Hilbert Curve	1	13	16.29	34 34
2153	Internet is Faulty		69	38.54
2154	Kruskal		85	14.03
2157	Anti-Blot System	104	12967	45.24	10 5
2159	Delicious Cake		30	14.64
2160	Here-There		30	24.76
2161	Pixel Shuffle		34	21.03	50 17
2162	Towers of Powers		26	13.87
2171	Ambiguous Codes	1	85	39.47
2172	Ballroom Lights	1	35	32.94	34 17
2173	Car Plates Competition	1	261	42.05	17 17
2174	Drop the Triples	5	122	29.04	21 24
2175	Emoticons	3	332	22.01	23 28
2176	Finding Seats	2	224	15.00	34 34
2177	Galou is back!	-1	226	31.01
2178	He is offside!	5	8447	50.13	3 4
2179	ICPC Scoreboard	1	180	29.76	17 17
2180	Justice League		83	48.97
2185	Musical Optimization	1	73	43.15
2189	Making Pairs	1	48	16.54	34 42
2202	Tan and His Interesting Game		46	25.18
2270	Balloons in a Box		172	23.77
2271	Undecodable Codes		48	12.27
2272	Crossing the Desert		54	20.12
2273	Ferries		32	18.75
2274	Island Hopping	1	207	25.14	17 1
2275	Toil for Oil		15	28.65
2276	Partitions	1	24	13.02	34 26
2277	Silly Sort	30	882	55.45	17 27
2317	Bracket Sequence	1	57	23.73	26 34
2318	Overlapping Words		90	22.40
2319	Sequence		218	28.12
2320	Manhattan	9	703	32.39	20 34
2321	Segments	2	156	13.91	17 34
2322	Tree Game	2	325	43.37	26 42
2323	Broken Compass		47	13.78
2324	Mario	1	63	14.00	34 34
2325	String Distance		214	21.51
2371	Another Longest Increasing Subsequence Problem	18	843	13.67	30 33

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