Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
2140	(un)Fair Play		74	38.91
2141	Golden Garden		17	17.86
2142	Arranging Flowers		23	9.57
2143	Dependency Problems	4	517	39.00	17 13
2144	K Edge-disjoint Branchings		9	16.21
2147	Root of a Linear Equation		58	8.39	34 17
2148	Candy III	54	20337	25.29	9 5
2149	Biased Standings	21	3461	33.28	5 5
2150	Counting Subsequences	12	1023	29.50	8 13
2151	Digital Calculator		22	5.81
2152	Hilbert Curve	1	13	16.29	34 34
2153	Internet is Faulty		64	41.34
2154	Kruskal		82	15.11
2157	Anti-Blot System	104	12908	45.24	10 5
2159	Delicious Cake		29	16.00
2160	Here-There		27	26.63
2161	Pixel Shuffle		29	19.57	50 17
2162	Towers of Powers		28	19.72
2171	Ambiguous Codes	1	63	34.57
2172	Ballroom Lights	1	33	33.75	34 17
2173	Car Plates Competition	1	233	40.56	17 17
2174	Drop the Triples	5	116	29.73	21 24
2175	Emoticons	3	327	21.95	23 28
2176	Finding Seats	2	220	14.87	34 34
2177	Galou is back!	-1	223	31.13
2178	He is offside!	5	8343	50.12	3 4
2179	ICPC Scoreboard	1	175	29.30	17 17
2180	Justice League		78	48.80
2185	Musical Optimization	1	69	42.36
2189	Making Pairs	1	44	16.21	34 42
2202	Tan and His Interesting Game		42	23.76
2270	Balloons in a Box		164	23.65
2271	Undecodable Codes		46	13.01
2272	Crossing the Desert		50	19.24
2273	Ferries		29	17.75
2274	Island Hopping	1	199	24.60	17 1
2275	Toil for Oil		13	30.72
2276	Partitions	1	19	10.80	34 34
2277	Silly Sort	30	800	55.01	17 27
2317	Bracket Sequence	1	52	23.46	26 34
2318	Overlapping Words		88	22.70
2319	Sequence		212	28.26
2320	Manhattan	8	689	32.21	20 34
2321	Segments	2	142	14.75	17 34
2322	Tree Game	2	323	44.01	26 42
2323	Broken Compass		41	13.47
2324	Mario	1	59	13.68	34 34
2325	String Distance		210	21.18
2371	Another Longest Increasing Subsequence Problem	15	763	13.22	29 33
2412	Arranging Amplifiers	18	3199	27.30	7 16

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