Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
26183	Laser Beam 2.0	1	4	5.06	17 17
32028	Ada and Parties		4	1.24	50 50
34357	Ludic Numbers (hard)	2	4	14.63
34973	Yet Another Subset Sum Problem	2	4	2.56	26 34
6957	Partial Palindrome		3	5.00
12805	Age of Empires		3	6.41
14665	Delta catheti (hard)	1	3	15.56
14700	Delta catheti II (Hard)	1	3	6.06
15091	One Good Base Deserves Another		3	28.57	34 1
15381	Cut The Rope		3	16.28	42 1
3647	Moebius		2	2.36
9000	Bob and his new kite factory		2	1.09
10443	Bridges		2	2.82
13895	Party Time		2	14.29
21135	Distinct Viewpoints		2	23.08	34 1
22320	Polynomial Drawing		2	9.52
10683	DRIVE		1	1.37
23435	Game Calculator		1	1.75
35287	Magical Matrices	1	1	1.01	17 34
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