Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	CODE	USERS	ACC %
1	Life, the Universe, and Everything	TEST	14915	39.72
2	Prime Generator	PRIME1	3860	15.72
4	Transform the Expression	ONP	3768	52.01
5	The Next Palindrome	PALIN	2424	17.21
6	Simple Arithmetics	ARITH	650	15.97
7	The Bulk!	BULK	149	31.44
8	Complete the Sequence!	CMPLS	639	36.33
9	Direct Visibility	DIRVS	105	23.10
10	Complicated Expressions	CMEXPR	311	29.79
11	Factorial	FCTRL	5071	48.94
12	The Game of Master-Mind	MMIND	100	50.24
13	Hotline	HOTLINE	86	44.61
14	I-Keyboard	IKEYB	327	40.41
15	The Shortest Path	SHPATH	604	16.84
16	Sphere in a tetrahedron	TETRA	364	44.17
17	The Bytelandian Cryptographer (Act I)	CRYPTO1	270	32.82
20	The Bytelandian Cryptographer (Act IV)	CRYPTO4	16	6.89
22	Triangle From Centroid	TRICENTR	385	36.71
23	Pyramids	PIR	907	39.49
24	Small factorials	FCTRL2	4330	39.04
25	Pouring water	POUR1	522	16.93
26	Build the Fence	BSHEEP	405	28.86
27	Sorting Bank Accounts	SBANK	1114	30.38
28	Help the Military Recruitment Office!	HMRO	250	12.95
29	Hash it!	HASHIT	722	25.45
30	Bytelandian Blingors Network	BLINNET	524	28.57
31	Fast Multiplication	MUL	300	12.60
32	A Needle in the Haystack	NHAY	784	39.63
33	Trip	TRIP	346	21.95
34	Run Away	RUNAWAY	115	31.57
35	Equipment Box	EQBOX	367	16.32
36	Secret Code	CODE1	108	30.46
37	The Proper Key	PROPKEY	91	29.71
38	Labyrinth	LABYR1	846	25.86
39	Piggy-Bank	PIGBANK	1092	35.26
40	Lifting the Stone	STONE	436	21.57
41	Play on Words	WORDS1	775	22.07
42	Adding Reversed Numbers	ADDREV	5378	52.32
43	Copying Books	BOOKS1	498	26.09
44	Substitution Cipher	SCYPHER	154	16.15
45	Commedia dell Arte	COMMEDIA	104	47.24
47	Skyscraper Floors	SCRAPER	145	17.52
48	Glass Beads	BEADS	758	43.62
49	Hares and Foxes	HAREFOX	59	25.64
50	Invitation Cards	INCARDS	285	45.05
51	Fake tournament	TOUR	259	19.91
54	Julka	JULKA	2844	35.73
55	Jasiek	JASIEK	213	27.73
56	Dyzio	DYZIO	559	32.56
57	Supernumbers in a permutation	SUPPER	327	33.53