Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
19687	Symmetric matrix 2		0	0.00
32065	Save Lord Tachanka	1	0	0.00
35535	Bill of Fare		0	0.00
36644	Minimum string moves	1	0	0.00	34 1
36896	Supraiden		0	0.00
3647	Moebius		1	2.44
10683	DRIVE		1	2.04
23435	Game Calculator		1	5.88
35287	Magical Matrices	1	1	1.54	17 34
275	The Water Ringroad		2	8.33
9000	Bob and his new kite factory		2	1.41
10443	Bridges		2	3.28
13895	Party Time		2	22.73
21135	Distinct Viewpoints		2	21.43	34 1
22320	Polynomial Drawing		2	8.00
363	Crane Operator		3	1.41
2019	The Rolling Ball		3	5.08
6957	Partial Palindrome		3	7.69
12805	Age of Empires		3	15.62
13816	Pheversos Game		3	20.00
14665	Delta catheti (hard)	1	3	17.28
14700	Delta catheti II (Hard)	1	3	7.55
15091	One Good Base Deserves Another		3	57.14	34 1
15381	Cut The Rope		3	17.50	42 1
32028	Ada and Parties		3	1.16	50 50
34385	Pripyat		3	15.00
41790	Spy Reloaded		3	7.69
850	Soccer Choreography		4	4.00
2419	G-Line Grid	1	4	6.78
3483	Begin		4	10.75
11384	Zoom Operation		4	19.05
11900	Spelling Suggestion		4	12.50
12806	Blackjack		4	20.83
12855	Teleport		4	14.63	17 34
13882	THE WITTY BOY	1	4	4.28	34 17
13926	Flipping Slipping of grids	1	4	20.00	17 50
13945	GHALIBS CHALLENGE		4	31.25
15382	Factorial (Again!)		4	38.30	50 1
17779	Charlie and the Chocolate Factory		4	10.87
21969	Money Transfers		4	22.73
22177	RajaRani	3	4	5.13	17 17
22675	A conjecture of Paul Erdős (hard)	2	4	5.00	34 34
25336	Eefun Plays Doto		4	24.32
26183	Laser Beam 2.0	1	4	18.18	17 17
34357	Ludic Numbers (hard)	2	4	17.91
34973	Yet Another Subset Sum Problem	2	4	3.33	26 34
3482	Alias		5	62.50
4189	Landing		5	3.88
5637	LL and ErBao		5	49.15
9694	Quelling Blade		5	25.00