Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	USERS	ACC %	DIFFICULTY C I
14387	Science	13	20.24
14751	Self Descriptive Number	42	57.29
14819	Permutation Generator	27	38.10
14830	The Codefather	8	6.07	1 1
14833	The Fox and the Wolf	15	29.28	17 17
14839	Boxdropper	17	34.34	17 17
14848	Boxlings	14	11.05
14858	digit count	39	23.84
14883	Box Factory	15	37.78
14889	Good Strategy	53	40.22
14946	Travelling Santa	51	37.29	9 9
14949	HELPER	13	64.00
14957	Chinese game	21	21.97
14961	Maximum Girth	619	55.10	17 26
14991	Your Rank is Pure (EXTREME ver)	8	37.23
15060	Elegant Diamond	15	56.25
15061	World Cup 2010	27	57.41
15075	A Romantic Dinner Outing	22	21.39	1 1
15076	A Romantic Movie Outing	24	21.25
15088	Ancient Aliens	5	62.50	34 1
15089	Farmer Joe	6	36.67
15091	One Good Base Deserves Another	3	57.14	34 1
15092	A Kleene Implementation	5	44.44
15248	Swap (Easy - Level 2)	15	30.67	1 1
15249	Swap (Medium - Level 200)	6	23.86
15252	Humans Life Code	7	55.56
15360	World Record Lunch	24	12.76
15381	Cut The Rope	3	18.42	42 1
15382	Factorial (Again!)	4	43.37	50 1
15383	Transform the Expression (Again!)	7	43.48
15434	Life on Fornax	24	64.29
15435	Schedules	23	13.33
15460	Selling Art	8	23.33
15568	Fire Extinguishers	19	45.28
15573	Keyboard	13	35.90
15576	Aesthetic Text	15	38.10
15636	Histology Assistant	8	37.84	17 17
15961	MAXSET	44	34.08
15996	Number Magic II	23	28.35	26 17
16018	Edge Detection	11	45.83
16048	Help Rarity Collect Crystals	20	22.35
16138	Deconnecting	57	38.04	1 1
16178	Change	59	10.07
16180	Ratar	72	27.81	17 17
16240	Easy Password	41	5.09	17 26
16284	Game of stones	101	57.32
16297	Sir and The ICC Ratings	22	23.00
16307	Game of stones II	21	37.04
16410	Organizator	75	34.80
16411	Slasticar	22	56.60