Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
7807	The Lucky Prisoner		27	9.84
7862	Prisoner of Benda		27	25.83
8328	Move the books		27	24.19
10087	Sensor Network		27	20.95
11834	DOJO Corridor II	3	27	30.69	42 34
12009	Fibonacci recursive sequences (hard)	2	27	10.04	34 34
13621	Security		27	28.32
14035	Winter Crush		27	36.84
14864	Sales	1	27	25.85	34 34
14894	Good Celebration	3	27	20.10	26 30
14925	King Graffs Trip	2	27	21.53	34 34
14947	Breaking and Entering	2	27	36.08	26 9
15076	A Romantic Movie Outing		27	18.39
15996	Number Magic II		27	26.28	26 17
16956	Encoded Coordinates	1	27	33.02	17 34
17789	Space Bridges		27	39.60
18393	Hamiltonian Cycles	1	27	17.67	17 17
20971	Alia and Substrings	-1	27	22.16	34 34
21058	Dirty Plates		27	32.65
26214	Pisano Factors	3	27	30.06	26 26
26744	Coverage		27	36.94
31897	If Chain	1	27	46.53	17 17
34380	Even Semiprime Runs	4	27	63.45	28 28
34499	So Many Squares	6	27	23.76	34 37
36577	K-transfer journey	4	27	39.00	21 26
36998	Superpowertree	2	27	29.25	17 17
2162	Towers of Powers		26	13.87
3010	Castle Wall		26	20.15
3533	Game on board		26	31.14
3581	Tree Similarity	1	26	37.66	34 34
3641	Earthquakes		26	36.14
3895	Matrix Game		26	21.77
5016	Guernica		26	61.54
5300	Mexican Standoff		26	24.19
6693	C - Karaoke		26	56.18
7603	Fibonacci Factor	1	26	25.49
7666	Telecommunications		26	28.30
9489	Johny Hates Math		26	7.19
9504	Paint on a Wall	1	26	42.31	34 26
9519	Distinct Submatrices	1	26	14.22	50 50
9690	Universal Question Answering System		26	24.00
10574	Soccer Ceremony		26	40.43
11179	Korra in the Spirit World		26	41.24
11906	Rescue On Time	-1	26	33.00	34 17
12413	Toward Infinity		26	38.77
13815	India in Box		26	15.77
14957	Chinese game		26	24.19
16686	Some Sums	3	26	28.37	34 26
18522	Tours		26	21.76	42 26
20930	Progression	4	26	8.01	34 34

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