Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
1421	Goods		148	30.65	1 34
1441	The Clever Typist	1	34	8.28	17 34
1444	DEL Command II		41	9.82	17 34
1452	Birthday Cake		112	26.86	17 34
1466	Blue Mary Needs Help Again	5	226	20.82	30 34
1473	Lemon Tree in the Moonlight		28	19.74	50 34
1476	Maximum Profit	7	375	32.36	20 34
1526	Ranklist Sorting	1	28	13.10	17 34
1553	Backup Files	3	995	21.50	17 34
1644	Trees	1	39	14.03	34 34
1687	Logic II	1	36	17.65	34 34
1689	Hard Problem	-1	19	26.67	17 34
1726	Exchange		24	7.92	50 34
1748	Sequence Partitioning II	2	60	24.76	26 34
1803	Fold	1	60	43.21	1 34
1825	Free tour II	1	571	14.29	26 34
1838	Ticket to Ride		91	41.94	17 34
1839	The Bookcase	2	131	37.88	17 34
1843	Leonardo Notebook	3	382	34.85	17 34
1875	Cool Numbers	7	169	30.30	34 34
1878	Farmers Cattle	1	57	36.89	34 34
1879	Game Time	1	101	22.17	34 34
2000	Boxes (Hard)	2	17	2.95	26 34
2009	Cryptography	1	142	4.79	1 34
2124	Last Non-Zero Digit of Factorials	4	488	25.49	26 34
2152	Hilbert Curve	1	13	16.29	34 34
2176	Finding Seats	2	224	15.00	34 34
2317	Bracket Sequence	1	57	23.73	26 34
2320	Manhattan	9	705	32.41	20 34
2321	Segments	2	156	13.91	17 34
2324	Mario	1	63	14.00	34 34
2420	Hospital at Hands		31	23.44	34 34
2531	Spatial Concepts Test	1	74	66.39	17 34
2649	Weird sorting	1	61	25.64	1 34
2666	Query on a tree IV	4	746	13.54	38 34
2668	Polygon	1	68	20.45	26 34
2678	Closest distance	1	167	13.83	28 34
2743	Prefix Tiling	1	166	27.86	17 34
2816	Common Subsequences	5	223	28.92	26 34
2829	Time Limit Exceeded	4	260	21.67	34 34
2833	Super Dice Game	1	24	9.62	17 34
2880	Wild West		103	42.23	17 34
2885	Word Rings	2	403	15.79	17 34
2899	Volunteers		60	45.00	17 34
2902	Candy IV		33	46.46	50 34
2940	Untitled Problem II		126	15.45	34
2963	Painting Blocks (Act II)	1	61	21.28	17 34
3003	Median Filter	2	21	42.66	34 34
3070	How many subsequences	1	99	9.90	34 34
3109	Longest Common Prefix	4	396	25.51	38 34

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