Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
9942	Holiday Accommodation	30	1115	26.13	23 25
9943	Isabella Message	1	69	24.22	17 17
9944	Ji-Tu Problem		17	11.23
9948	Will it ever stop	121	17943	43.01	4 9
9950	IQ Team	1	44	43.31	50 50
9952	111…1 Squared	8	1793	46.40	5 10
9964	Fibonacci vs Polynomial	6	130	40.90	24 34
9967	Playing with Words	2	36	31.95	34 26
9968	Magic Crystals and Laser Beams		179	23.53
9969	Road Network	1	307	21.94	17 9
9970	The Egyptian Parliament		50	18.91
9971	Adventurous Chess Masters		25	45.16
9972	The SKey	1	84	16.62	17 26
9973	Problem Set Score	4	918	39.55	12 17
9974	Men From Mars		22	37.70
9975	No Stories Any More!	1	46	29.02	34 34
9985	Distance	2	63	23.31	42 34
10050	Power Tower City	7	139	67.14	26 29
10069	Kompići	19	840	68.49	11 20
10070	Trick or Treat	2	253	67.00	12 17
10071	Working at the Restaurant		39	40.38
10072	Lights	1	63	47.47	17 34
10073	Darts	1	37	60.00
10074	Genetics		9	33.33
10075	Haunted Graveyard	2	42	19.17	26 26
10076	Slalom		32	33.67
10077	Routing		23	43.55
10078	Happy Telephones	2	294	48.89	1 1
10079	Stammering Aliens	1	167	32.18	17 17
10080	Lawn Mower	4	231	52.57	12 6
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
10089	Locks and Keys	1	18	33.73	34 17
10091	Three-sided Dice		31	22.00
10092	Party Night		30	30.00
10095	Caper Pizza		28	25.93
10096	Lights (Extreme)		56	29.80	17 17
10105	Alphabet Soup		31	42.57
10106	Coin Collecting		48	35.03
10107	Cybercrime Donut Investigation	2	56	25.17	34 42
10108	Distributing Ballot Boxes	32	1165	36.21	11 15
10109	Game, Set and Match		100	65.96
10110	Guess the Numbers		124	44.36	17 17
10111	Nonnegative Partial Sums	15	534	30.05	19 19
10112	Peer Review		116	32.79

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