Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
55	Jasiek	3	468	28.14	21 13
56	Dyzio	8	1216	31.41	11 14
57	Supernumbers in a permutation	22	1086	32.85	17 19
58	Crime at Piccadily Circus	3	643	13.91	31 21
59	Bytelandian Information Agency	2	415	19.54	17 23
60	The Gordian Dance	3	233	40.36	12 45
61	Brackets	177	5469	24.38	19 20
62	The Imp	1	295	30.40	17 23
63	Square Brackets	92	3862	56.72	14 18
64	Permutations	98	4349	52.02	12 20
65	Ball	2	154	34.96	17 23
66	Cross-country	38	4085	64.46	11 12
67	Cutting out	2	297	41.06	30 27
68	Expression		163	29.61	1 34
69	Moulds	2	132	34.90	12 12
70	Relations	2	250	28.58	9 17
71	Tree	3	451	28.47	12 9
73	Bacterial	1	71	18.97	50 17
75	Editor		51	33.15
76	Editor Inverse		64	14.75
77	New bricks disorder	1	285	37.73	17 17
78	Marbles	68	8057	34.97	15 13
82	Easy Problem	4	499	34.82	17 9
83	Bundling	1	53	40.00	17 17
84	Shortcut	1	233	31.59	17 9
85	Dice Contest		47	22.05	34 34
86	November Rain	4	295	17.53	21 21
87	Football	1	65	21.28	17 1
88	Which is Next	1	129	20.20	34 34
89	Hang or not to hang	1	61	15.67	17 17
90	Minimizing maximizer	3	381	24.72	17 26
91	Two squares or not two squares	79	6055	24.63	11 14
92	Cutting off Squares	-1	257	42.03	1 1
94	Numeral System of the Maya	4	2584	40.50	10 6
95	Street Parade	318	18401	29.05	14 11
96	Shopping	46	3074	44.13	15 11
97	Party Schedule	251	8886	36.20	14 16
98	Dance Floor	3	718	40.19	12 12
99	Bus		187	22.25	34 17
100	Tower of Babylon	45	3073	50.45	19 21
101	Fishmonger	48	2308	38.16	17 21
102	GX Light Pipeline Inc		77	31.02
104	Highways	2	788	20.18	23 28
105	Alice and Bob	3	172	27.05	42 42
106	Binary Stirling Numbers	3	2670	36.87	4 17
107	Calendar of the Maya	5	133	44.53	21 17
108	Decoding Morse Sequences	7	869	24.18	24 17
109	Exchanges	1	126	45.35	34
110	Fill the Cisterns	29	1412	31.35	21 20
112	Horizontally Visible Segments	1	158	27.87	17 34

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