Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
37390	Colored Development	4	25	37.84	17 26
3941	Kth Shortest Path		26	29.38
5018	Street Gambler		26	43.55
6296	Experiment		26	20.39
7603	Fibonacci Factor	1	26	26.94
9445	Attack of the Clones		26	50.85
9750	Polygon Diagonals		26	29.13
10699	Symmetry	1	26	36.63	17 34
10822	The Prime Minister	1	26	13.35
11179	Korra in the Spirit World		26	41.24
13156	Tom and Jerry		26	12.13
15242	Betos Quest	1	26	29.44	34 26
17821	My Name is UMMM!	2	26	18.75	17 9
18915	Anils Proposal	2	26	18.54	50 50
20930	Progression	4	26	8.90	34 34
21085	Palindrome Merge	1	26	26.67	17 17
22766	Make Sets	2	26	56.72	9 26
318	Pythagorean Legacy		27	22.22	1 34
2160	Here-There		27	26.63
2423	Minimal Triangulations of Graphs		27	33.33
2511	Magic Program IV		27	17.99
2709	Untitled Problem		27	17.75
3382	Monster Trap	1	27	22.44	34 17
3894	Bouncing Balls		27	37.74
3939	Search of Concatenated Strings		27	26.32
4307	Stamps		27	41.56
5149	History of Languages		27	15.54
7807	The Lucky Prisoner		27	9.93
8328	Move the books		27	33.33
10091	Three-sided Dice		27	21.48
10095	Caper Pizza		27	27.56
11090	Large banner		27	33.33
11830	DOJO Corridor I		27	41.43
12241	Classification from Erdős and Selfridge	5	27	17.71	28 28
13031	Vision Field		27	23.89	34 34
14819	Permutation Generator		27	38.10
15061	World Cup 2010		27	57.41
16035	Fone Frequencies	1	27	43.42	17 1
17789	Space Bridges		27	40.20
19139	Boiling Vegetables		27	34.31
19297	Nymphs from H10		27	31.37
20987	Sequence	2	27	23.18	9 17
21057	Super Lucky Palindromes	3	27	29.63	34 34
21858	Christmas is coming	2	27	13.38	42 26
21965	Book Club	1	27	33.71	17 17
23930	Overlapping Words	3	27	25.76	17 17
26788	Tiho Brdo	4	27	35.56	17 23
34117	Just a Palindrome	1	27	8.67	34 34
34863	A Cumulative Sum Problem	5	27	20.77	34 42
2162	Towers of Powers		28	19.72

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