Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	USERS	ACC %	DIFFICULTY C I
8542	Modern Pocket Calculator	35	9.05	28 6
8546	Manoj and Pankaj	51	18.32
8593	Covering the Corral	12	36.96
8594	Tails all the way	293	34.63
8627	I2C	35	24.85
8628	Selling Land	73	47.78
8657	The Bovine Accordion and Banjo Orchestra	8	22.81
8661	Bogosort	46	15.27
8663	Squares Game	34	33.05
8816	Mravograd	28	28.36	17 34
8836	Yet Another Sequence Problem	78	23.49
8844	Detection of Extraterrestrial	126	36.51
8846	Fudan Extracurricular Lives	7	25.00
8848	Herbicide	19	18.87
8849	Imitation	28	24.82
8886	Guess number!	21	5.90	34 34
8945	Grid points (speed variation)	31	24.38
8951	brownie	73	49.17
8971	LQDNUMBERS	36	35.04
8992	A los saltos	39	29.81
9000	Bob and his new kite factory	2	1.09
9030	Bob and his towers	40	30.12
9038	Chessboard Billiard	54	26.56
9063	Shuffling cards	16	28.92
9084	Journey to Mars	107	23.68
9086	Formula 3D	6	9.86
9118	Genetic Fraud	152	29.47
9121	Magical Crafting	58	46.94
9123	Security Zone	39	27.45
9124	Sightseeing	120	17.92
9125	Suiting Weavers	91	29.52
9137	Pyramid Sums	96	35.60	34 17
9161	Legendre symbol	190	45.42	9 9
9190	Perfect Maze	31	1.73
9260	Perfect Road	16	20.37	17 17
9331	DCD	64	52.07	17 1
9378	Landfill	70	42.44
9382	Complan Carnival	41	34.62
9430	The game of 31	165	39.30	13 17
9434	New Horizons	11	31.75
9440	To Add or to Multiply	19	16.26
9445	Attack of the Clones	29	52.31
9446	Shortest Circuit Evaluation	28	43.75
9447	Genetics	47	33.53
9448	Swarm of Polygons	39	31.21
9489	Johny Hates Math	26	7.19
9506	Jimmy´s Travel Plan	23	40.66
9507	Mario and Mushrooms	346	57.00	1 34
9509	Shortest Path on a Cylinder	28	31.51
9511	24-Puzzle	24	17.76