Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
682	Pairs of Integers		203	25.27
684	Another Assignment Problem	1	103	12.40	34 1
685	Partition the sequence	3	230	21.06	23 34
687	Repeats	1	887	25.22	34 42
688	Toy Cars	2	564	17.75	17 23
693	Lethal Warfare	2	359	46.54	9 17
694	Distinct Substrings	91	5530	26.38	21 24
695	Unite Fast	1	128	27.26	17 17
696	Truth or not	1	268	21.64
697	Matrix Words		94	26.20
698	Plane Hopping	1	286	25.77	17
699	Huge Knap Sack	1	138	24.89	17 17
700	Branch Prediction		74	18.00
702	Barn Expansion		151	23.30
703	Mobile Service	6	911	21.53	24 28
704	Remove The String	12	602	14.92	17 27
705	New Distinct Substrings	41	3686	26.27	26 24
707	Triple-Free Sets	1	161	40.53	34 34
709	The day of the competitors	38	1549	28.85	17 27
726	Promotion	24	2068	28.12	12 8
729	Move your armies		77	20.04
733	Mountain Walking	1	750	25.35	34 26
734	Ivan and his interesting game		228	34.19
735	Minimum Diameter Spanning Tree	1	182	33.93	17 30
738	Another Counting Problem	1	224	40.32
739	The Moronic Cowmpouter	19	3043	50.58	11 15
740	Treats for the Cows	261	8506	42.61	13 14
741	Steady Cow Assignment	5	470	31.06	20 31
744	Longest Permutation	4	602	19.72	15 19
757	Thermal Luminescence		121	39.26
760	Convex Hull 3D		117	41.56
780	The Archipelago		36	42.18	45 34
827	Trigonometric optimization		77	27.87
839	Optimal Marks	8	821	24.47	28 34
850	Soccer Choreography		4	4.02
861	Counting inversions	6	459	20.04	34 28
866	DNA Translation		117	21.59
867	Perfect Cubes	11	2173	47.57	7 5
869	Galactic Import	3	139	45.56	6 6
870	Basically Speaking	7	1436	43.73	6 6
871	Letter Sequence Analysis	3	106	42.68	26 9
872	Mark-up		119	29.50	34 17
898	Transmitters	2	286	48.79	34 26
899	Ws Cipher	6	837	38.33	14 15
900	Split Windows		31	56.90
901	Index Generation		37	53.09
902	Hangover	56	17787	62.76	3 3
903	Double Vision		64	56.49
904	Image Perimeters	3	331	59.44	17 17
912	Submatrix of submatrix	1	166	26.16	34 17

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