Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
3762	Bread Tree		161	13.50
44	Substitution Cipher	2	318	13.48	17 17
7629	Building Ports		43	13.48
2323	Broken Compass		41	13.47
2648	Archiver	1	44	13.46	34 50
1326	A Chase In WonderLand	2	402	13.44	9 1
14823	Advanced Battleships	5	49	13.42	23 23
18530	Font Size	7	199	13.41	15 5
21858	Christmas is coming	2	27	13.38	42 26
10822	The Prime Minister	1	26	13.35
15435	Schedules		23	13.33
3972	Stargates		45	13.29
2371	Another Longest Increasing Subsequence Problem	15	763	13.22	29 33
19954	Travelling Knight 2	2	15	13.20	42 26
5155	Exciting Time		39	13.19
5014	Crazy Receptionist		11	13.18
35337	Faketorial Hashing	1	10	13.16	34 34
11851	Power with Combinatorics(HARD)	1	127	13.10	34 42
205	Icerink		8	13.10
18522	Tours		22	13.10	42 26
245	Square Root	4	563	13.04	20 10
241	Arranging the Blocks		52	13.04
278	Bicycle		55	13.03	34 1
146	Fast Multiplication Again		36	13.03
13420	Fimodacci	3	36	13.03	12 26
26772	Lets Be An Anagrammatist	5	33	13.02	26 21
2271	Undecodable Codes		46	13.01
6720	Paper Fold		19	13.01
25810	Divisibility Test	10	57	12.93	24 26
15328	Hunter x Hunter	-1	71	12.91	1 17
20926	Special Numbers (Reverse and Add)	1	21	12.83	26 26
188	Rectangles	2	181	12.82	17 23
5158	Heroes Arrangement		12	12.80
15360	World Record Lunch		24	12.76
32567	First to meet the spaceship	1	31	12.76	34 17
1526	Ranklist Sorting	1	23	12.75	17 34
1784	IOICamp Sequence	1	318	12.74	1 17
9508	Magic Bitwise AND Operation		104	12.72
32029	Ada and Connections	6	69	12.72	24 24
14929	Subsequence	3	172	12.71	9 15
13801	Dexter Rank	1	9	12.64	34 34
327	Platon and Socrates		49	12.64	9 34
10800	GAME		21	12.64
12210	High and Low		61	12.63
31036	Ada and Mulberry	4	112	12.63	26 26
47	Skyscraper Floors	5	280	12.63	26 17
10082	Comparing Answers		57	12.59
25471	AM FM	2	36	12.53	17 34
1687	Logic II	1	24	12.50	34 34
9944	Ji-Tu Problem		14	12.50

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