Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
19687	Symmetric matrix 2		0	0.00
20983	Hogwarts		0	0.00
22316	pK		0	0.00
32065	Save Lord Tachanka	1	0	0.00
34385	Pripyat		0	0.00
34389	Duck Game		0	0.00
35337	Faketorial Hashing	1	0	0.00	34 34
35535	Bill of Fare		0	0.00
36644	Minimum string moves	1	0	0.00	34 1
36896	Supraiden		0	0.00
10443	Bridges		1	20.00
10683	DRIVE		1	3.03
12805	Age of Empires		1	4.76
13816	Pheversos Game		1	33.33
13895	Party Time		1	28.57
21135	Distinct Viewpoints		1	100.00	34 1
22320	Polynomial Drawing		1	12.50
23435	Game Calculator		1	20.00
32028	Ada and Parties	-1	1	1.02	50 50
35287	Magical Matrices	1	1	2.22	17 34
37420	Anti Hash	1	1	20.00	34 34
275	The Water Ringroad		2	12.12
2019	The Rolling Ball		2	3.64
6957	Partial Palindrome		2	7.69
9000	Bob and his new kite factory		2	1.47
9694	Quelling Blade		2	16.67
11384	Zoom Operation		2	11.11
11900	Spelling Suggestion		2	14.29
12806	Blackjack		2	66.67
14665	Delta catheti (hard)	1	2	16.67
14700	Delta catheti II (Hard)	1	2	9.09
15091	One Good Base Deserves Another		2	50.00	34 1
15257	Partition function (HARD)	1	2	1.75	50 42
15381	Cut The Rope		2	16.22	34 1
22177	RajaRani	2	2	4.65
25336	Eefun Plays Doto		2	20.00
25450	When Does The World End	1	2	2.60	34 50
26194	The wit of Tenali Raman		2	4.55
26843	Who is the Best?		2	40.00
34357	Ludic Numbers (hard)	2	2	17.07
34379	Another Travelling Salesman Problem		2	50.00
34973	Yet Another Subset Sum Problem	1	2	5.88	17 34
36936	K-Divisors	2	2	3.57	34 34
37422	Recurrence Power Sum	1	2	4.72
37446	Breaking Math	1	2	4.35
850	Soccer Choreography		3	2.99
2419	G-Line Grid	1	3	6.98
3466	Another Longest Common Subsequence Problem		3	50.00
4459	Muzidabutur		3	20.00
7627	Driving Direction		3	16.67