Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	USERS	ACC %	DIFFICULTY C I
9086	Formula 3D	6	21.21
9118	Genetic Fraud	150	29.73
9121	Magical Crafting	56	46.69
9123	Security Zone	35	26.87
9124	Sightseeing	116	17.61
9125	Suiting Weavers	84	29.38
9137	Pyramid Sums	92	34.78	34 17
9161	Legendre symbol	186	45.28	9 9
9190	Perfect Maze	31	1.73
9260	Perfect Road	12	16.55	17 17
9331	DCD	62	51.50	17 1
9378	Landfill	62	46.91
9382	Complan Carnival	35	36.36
9430	The game of 31	162	38.96	13 17
9434	New Horizons	11	31.75
9440	To Add or to Multiply	15	14.71
9445	Attack of the Clones	26	50.85
9446	Shortest Circuit Evaluation	28	45.90
9447	Genetics	41	35.29
9448	Swarm of Polygons	36	35.59
9489	Johny Hates Math	21	16.92
9506	Jimmy´s Travel Plan	17	39.69
9507	Mario and Mushrooms	341	56.80	1 34
9508	Magic Bitwise AND Operation	103	12.59
9509	Shortest Path on a Cylinder	11	28.78
9511	24-Puzzle	23	21.85
9512	Bombing	83	22.69	17 17
9513	Game	17	28.81
9515	Dwarven Sniper´s Hunting	10	56.00
9516	XOR Equations	14	18.07
9517	Unlock the Cellphone	11	26.88
9527	Department	10	7.01	34 17
9528	Johns Trip	18	32.50
9534	Turn on the lights	67	32.81
9543	Dynamic Congruence Equation System	10	68.64	50 50
9636	A Canvas Building	66	19.12	17 17
9638	Circuits	23	8.41	50 34
9642	Getting There Fast	14	14.49
9645	Joy of CompuTenis	6	17.65
9686	Yummy Triangular Pizza	475	65.62	26 17
9689	Very Boring Homework	15	33.33
9690	Universal Question Answering System	24	25.14
9691	Triangles and Quadrangle	14	12.32
9692	Share the Cakes	7	10.53
9694	Quelling Blade	5	33.33
9723	Card Shuffling	37	25.76
9746	Bytelandian Tours	15	24.32
9749	Cliques	66	27.34
9750	Polygon Diagonals	26	28.17
9753	Tuple Division	17	4.10