Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
204	Sleepwalker		82	29.10
205	Icerink		6	11.27
206	Bitmap	160	6346	26.69	15 16
207	Three-coloring of binary trees	12	776	35.65	19 16
208	Store-keeper	2	93	14.76	34 34
209	The Map		213	42.89
210	The Altars		42	14.29
211	Primitivus recurencis		198	26.32
212	Water among Cubes	28	900	27.87	24 28
215	Panic in the Plazas		77	19.35
217	Soldiers on Parade		118	28.45
220	Relevant Phrases of Annihilation		488	33.96
224	Vonny and her dominos	2	514	52.17	1 1
226	Jewelry and Fashion	1	17	15.03	34 50
227	Ordering the Soldiers	15	1238	34.02	18 22
228	Shamans		128	20.67
229	Sorting is easy		114	25.45
231	The Zebra Crossing		1	0.29
234	Getting Rid of the Holidays (Act I)		94	14.06
235	Very Fast Multiplication	16	755	30.41	28 22
236	Converting number formats		142	43.57
237	Sums in a Triangle	-2	3324	41.91	22 8
238	Getting Rid of the Holidays (Act II)		77	15.58
239	Tour de Byteland	1	79	24.91	17 17
241	Arranging the Blocks		50	12.66
243	Stable Marriage Problem	8	1140	45.59	19 23
245	Square Root	4	448	15.90	34 13
247	Chocolate	53	3112	48.47	9 17
260	Containers	2	261	45.72	23 17
261	Triangle Partitioning		192	59.31
262	Connections	1	95	27.26	34 34
263	Period	32	1866	43.75	11 19
264	Corporative Network	11	468	26.42	19 21
272	Cave Exploration	1	36	16.48
274	Johnny and the Watermelon Plantation		207	24.00
275	The Water Ringroad		2	12.12
277	City Game	8	1047	39.61	19 21
278	Bicycle		53	14.43
279	Interesting number	18	633	23.33	21 25
280	Lifts		42	18.94
283	Naptime		145	37.31
286	Selfish Cities	1	633	40.46	34 34
287	Smart Network Administrator	2	381	26.35	28 34
288	Prime or Not	29	2715	18.89	23 22
290	Polynomial Equations		55	21.35
291	Cube Root	1	224	16.65	26 13
292	Alibaba		149	22.50
293	Officers on the Beat		8	7.81
296	Teamwork is Crucial		66	30.77
297	Aggressive cows	527	12191	39.04	16 22

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