Sphere Online Judge (SPOJ)

list of challenge problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
53	Kamil	25	6352	49.36	7 6
72	Food Shortage in Byteland		250	55.25
126	Solovay-Strassen Inverted		101	57.56
127	Johnny Goes Shopping	9	1483	65.94	20 24
155	Solving the Puzzle	1	11	4.96	34 17
218	Points on a Sphere	1	187	67.52	17 26
219	Pawns Gone Wild		23	61.23
222	The Burning City		43	59.24
225	Nightmare in the Towers of Hanoi		18	46.56
232	Bytelandian Telecom		42	68.48
240	Santa Claus and the Presents		119	73.47
246	Plant a Christmas Tree		90	45.85
270	Digits of Pi	12	5854	71.35	9 19
276	Herdkeeper		49	68.20
285	Atomic Shelters	1	121	63.05	17 17
289	The Turing Music Box		73	68.95
294	Johnny and the Optimisation of Homework		16	45.43
295	Bytelandian Origami		26	61.83
298	Closing down Railway Lines	3	131	83.37	26 17
313	The Game of Crosses & Crosses		26	75.52
314	Digits of e	3	2991	59.49	1 1
315	The Secret Fellowship of Byteland		45	67.98
316	Japan Crossword		157	68.37
317	Simple Image Recognition	2	315	72.01	17 17
321	X-Words	1	19	64.46	34 17
326	Enjoying a Multiplayer Game		18	71.88
353	Displace	1	43	47.08	34 17
356	Tethering the Mammoths		12	82.50
378	Size Contest	21	10733	55.89	6 1
525	Fractions Calculator		52	41.59
528	Shortest Superstring	3	171	47.77	34 34
755	Rectangles in a Square		29	56.69
756	Literature List		64	68.05
758	Tetris AI		73	77.83
759	Hard Image Recognition		17	67.97
761	Minesweeper		49	40.33
919	Prime checker	10	1613	65.40	15 28
1414	SuDoku Puzzle	5	430	53.70	30 21
1416	Electrification		35	38.19
1422	Digital Image Processing	2	121	74.53	34 34
1423	Digits of SQRT(2)	6	2730	67.40	11 11
1481	Yet another computer network problem		23	66.75	34
1492	Lexicographic sort	4	444	50.16	17 9
1558	Math II		35	73.28
1690	Intercept		41	31.20
1711	Greatest Common Divisor		105	30.36
1742	Brainf_ck		70	36.24
2004	Analyse Simple Arithmetical Expressions	1	723	51.41	17 1
2471	Magic Program II	1	68	35.76	17 17
2624	JawBreaker Game	1	85	61.15	26 26

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