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	190	6867	27.14	15 16
207	Three-coloring of binary trees	14	799	35.74	17 15
208	Store-keeper	2	98	15.38	34 34
209	The Map		214	42.97
210	The Altars		42	14.29
211	Primitivus recurencis		199	26.44
212	Water among Cubes	36	984	27.98	23 27
215	Panic in the Plazas		77	19.35
217	Soldiers on Parade	2	120	28.50	26 17
220	Relevant Phrases of Annihilation		511	34.26
224	Vonny and her dominos	4	547	52.23	9 9
226	Jewelry and Fashion	1	17	15.03	34 50
227	Ordering the Soldiers	17	1292	34.25	19 22
228	Shamans		132	20.68
229	Sorting is easy		114	24.87
231	The Zebra Crossing		10	2.57
234	Getting Rid of the Holidays (Act I)		94	13.98
235	Very Fast Multiplication	18	887	31.52	27 22
236	Converting number formats		142	43.57
237	Sums in a Triangle	-8	3402	42.24	26 10
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	12.64
243	Stable Marriage Problem	10	1174	45.33	19 22
245	Square Root	4	459	15.69	34 13
247	Chocolate	60	3258	48.31	10 17
260	Containers	2	268	45.68	23 17
261	Triangle Partitioning		195	59.56
262	Connections	1	96	27.29	34 34
263	Period	41	1996	44.40	11 18
264	Corporative Network	13	480	27.16	19 21
272	Cave Exploration	1	36	16.48
274	Johnny and the Watermelon Plantation		208	24.21
275	The Water Ringroad		2	12.12
277	City Game	11	1074	40.05	19 21
278	Bicycle		53	14.43
279	Interesting number	23	729	24.55	19 25
280	Lifts		42	18.94
283	Naptime		155	37.40
286	Selfish Cities	1	648	40.21	34 34
287	Smart Network Administrator	3	393	26.34	24 31
288	Prime or Not	37	2973	19.09	22 23
290	Polynomial Equations		55	21.35
291	Cube Root	1	225	16.61	26 13
292	Alibaba		153	22.70
293	Officers on the Beat		8	7.81
296	Teamwork is Crucial		66	30.77
297	Aggressive cows	678	15089	37.94	16 22

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