Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %
8325	Partitioning the plane		40	41.46
8326	Leaky containers		32	40.20
8327	Progressive progressions		56	60.45
8328	Move the books		27	24.19
8331	Sister cities		39	50.50
8332	Ski slopes		28	22.08
8333	Place-name game		73	35.94
8334	Enumeration of rationals	2	91	17.06
8423	Recover Polynomials		57	49.36
8427	Permutation Game		34	39.81
8428	Grid Tiling		24	22.56
8429	Array Sorting		67	17.26
8478	Ancient Pocket Calculator		7	4.27
8546	Manoj and Pankaj		51	18.55
8593	Covering the Corral		9	32.50
8594	Tails all the way		291	34.51
8626	Show Me The Fax	1	110	43.03
8627	I2C		34	24.40
8628	Selling Land		73	48.35
8651	Alien arithmetic	1	43	18.00
8657	The Bovine Accordion and Banjo Orchestra		7	21.43
8661	Bogosort		45	15.07
8663	Squares Game		34	37.50
8732	Best Fit	1	195	30.76
8735	Suffix Of Cube	1	101	43.70
8759	Alpine Skiing	1	54	38.24
8795	Twenty Questions	1	43	21.78
8836	Yet Another Sequence Problem		76	23.29
8841	Avaricious Maryanna	1	77	37.36
8844	Detection of Extraterrestrial		124	36.22
8846	Fudan Extracurricular Lives		7	25.00
8848	Herbicide		18	18.10
8849	Imitation		28	24.46
8945	Grid points (speed variation)		30	24.00
8951	brownie		72	48.89
8971	LQDNUMBERS		35	34.56
8992	A los saltos		38	28.57
9000	Bob and his new kite factory		2	1.17
9030	Bob and his towers		38	29.19
9038	Chessboard Billiard		52	25.83
9063	Shuffling cards		16	30.38
9084	Journey to Mars		104	23.49
9086	Formula 3D		6	10.45
9118	Genetic Fraud		151	29.56
9121	Magical Crafting		56	46.50
9123	Security Zone		38	27.25
9124	Sightseeing		118	17.70
9125	Suiting Weavers		88	29.08
9190	Perfect Maze		31	1.73
9378	Landfill		66	43.30