Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %
9940	Fruit Ninja		41	27.73
9944	Ji-Tu Problem		17	11.23
9968	Magic Crystals and Laser Beams		179	23.53
9970	The Egyptian Parliament		50	18.91
9971	Adventurous Chess Masters		25	45.16
9974	Men From Mars		22	37.70
10071	Working at the Restaurant		39	40.38
10073	Darts	1	37	60.00
10074	Genetics		9	33.33
10076	Slalom		32	33.67
10077	Routing		23	43.55
10081	Periodic Points		12	35.90
10082	Comparing Answers		64	13.14
10084	Fake Scoreboard		24	45.95
10085	Palindromic DNA	1	20	27.78
10086	Jumping Monkey		59	25.95
10087	Sensor Network		27	20.95
10088	Assembly Line		37	33.33
10091	Three-sided Dice		31	22.00
10092	Party Night		30	30.00
10095	Caper Pizza		29	26.47
10105	Alphabet Soup		31	42.57
10109	Game, Set and Match		102	66.32
10112	Peer Review		116	32.79
10113	Regular Convex Polygon		101	30.40
10230	Robbing Gringotts		56	11.07
10235	Array Diversity	1	192	23.96
10242	Dice on a Board		20	31.76
10265	Subdivision of the kingdom		40	29.56
10292	Shell game	-1	504	19.05
10419	Polish Language		104	26.31
10421	Run, Snipe, Run		76	30.09
10425	Security System		29	53.42
10437	Quadrilaterals		75	25.42
10440	Friends		38	20.42
10443	Bridges		2	2.82
10444	Coding	1	101	35.61
10447	Contaminated City		70	13.74
10449	Resource Management		15	18.00
10450	Amoeba		101	17.24
10451	Stun Boosting		19	25.68
10454	Greens Land		100	28.54
10461	The magical escape		31	40.52
10465	One Theorem, One Year		50	43.62
10476	Fair bases		38	32.69
10506	Prendonians		52	26.42
10507	Cheese-rolling World Cup		57	33.18
10508	Buttons		47	24.03
10538	Derp		61	40.00
10571	Soccer Challenge		30	34.78