Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	USERS	ACC %	DIFFICULTY C I
9512	Bombing	89	23.46	17 17
9513	Game	20	18.58
9515	Dwarven Sniper´s Hunting	18	39.34
9516	XOR Equations	18	20.00
9517	Unlock the Cellphone	12	23.64
9527	Department	11	7.37	34 17
9528	Johns Trip	21	29.29
9543	Dynamic Congruence Equation System	10	54.97	50 50
9636	A Canvas Building	71	18.04	17 17
9638	Circuits	25	9.33	50 34
9642	Getting There Fast	19	17.69
9645	Joy of CompuTenis	9	15.38
9686	Yummy Triangular Pizza	485	65.64	26 17
9689	Very Boring Homework	16	33.33
9690	Universal Question Answering System	26	24.00
9691	Triangles and Quadrangle	17	13.25
9692	Share the Cakes	10	9.32
9694	Quelling Blade	10	31.58
9723	Card Shuffling	41	26.23
9746	Bytelandian Tours	14	16.67
9749	Cliques	70	28.68
9750	Polygon Diagonals	29	27.75
9753	Tuple Division	17	3.92
9755	Grey Area	301	62.05
9817	Shortcut	54	25.94	17 17
9856	The Glazier	72	47.16
9857	Eight Directions Crossword	137	14.94
9862	Help the Airline Company	15	19.23
9890	Piece it together	97	24.14
9891	Please, go first	221	54.66	26 17
9893	Smoking gun	41	27.46
9895	Tracking RFIDs	52	30.66
9896	Train delays	47	26.15
9936	Construct the Great Wall	13	42.86
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
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
10086	Jumping Monkey	59	25.95
10087	Sensor Network	27	20.95
10088	Assembly Line	37	33.33