Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
10822	The Prime Minister	1	26	13.35
21858	Christmas is coming	2	27	13.38	42 26
18530	Font Size	7	199	13.41	15 5
14823	Advanced Battleships	5	49	13.42	23 23
1326	A Chase In WonderLand	2	402	13.44	9 1
2648	Archiver	1	44	13.46	34 50
2323	Broken Compass		41	13.47
7629	Building Ports		43	13.48
44	Substitution Cipher	2	318	13.48	17 17
3762	Bread Tree		161	13.50
2678	Closest distance	1	159	13.52	28 34
3393	Knot or Not		6	13.56
4188	Amazing equality		38	13.58
10701	The Lazy Gamer		16	13.61
10447	Contaminated City		69	13.63
208	Store-keeper	2	115	13.64	34 26
3208	Yet Another Longest Palindrome Problem		68	13.65
2666	Query on a tree IV	5	669	13.65	38 34
2324	Mario	1	59	13.68	34 34
19954	Travelling Knight 2	3	16	13.77	45 34
18939	K-th smallest number	5	208	13.83	13 17
234	Getting Rid of the Holidays (Act I)		95	13.84	17 17
6826	Hacking	6	126	13.87	21 26
7692	Chemistry		69	13.87
26953	Kuchu the Bookworm	-1	50	13.88	17 15
30452	Moumita and Assignments	5	60	13.88	21 21
8265	Zero Count		14	13.89
58	Crime at Piccadily Circus	3	635	13.90	31 21
22037	Shortest Paths	1	20	13.97	1 34
22086	Prime Power Test	2	16	14.04	42 17
18450	Largest Increasing Sub-Matrix		11	14.05
1825	Free tour II	1	528	14.09	17 34
1810	Nuclear Plants		21	14.09
6804	Cheating or Not		16	14.09
23539	Split	3	30	14.13	17 17
398	Roll Playing Games		117	14.15	34 17
13815	India in Box		21	14.16
10818	Medium Factorization	20	1657	14.18	18 14
9066	Sum of Distinct Numbers	24	326	14.18	32 32
11066	AP - Complete The Series v2	8	1112	14.21	19 11
37387	Modulo Sequence	8	51	14.22	21 21
19913	Counting Pythagorean Triples	3	16	14.23	26 42
2885	Word Rings	2	313	14.29	17 34
6860	Asistent		23	14.29
25960	Cat and Mouse I		55	14.32
3926	Manhattan Wire		81	14.32
5294	Recurrence	2	255	14.32	28 17
8661	Bogosort		42	14.33
28460	Congratulations, Fidel!	1	38	14.33	17 17
28609	Boat Burglary	15	115	14.36	23 25

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