Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	CODE	USERS	ACC %
1	Life, the Universe, and Everything	TEST	41841	35.02
2	Prime Generator	PRIME1	10352	12.50
3	Substring Check (Bug Funny)	SBSTR1	362	11.22
4	Transform the Expression	ONP	9226	50.64
5	The Next Palindrome	PALIN	6122	15.17
6	Simple Arithmetics	ARITH	1196	12.82
7	The Bulk!	BULK	238	29.17
8	Complete the Sequence!	CMPLS	1171	35.39
9	Direct Visibility	DIRVS	163	18.52
10	Complicated Expressions	CMEXPR	498	27.76
11	Factorial	FCTRL	13727	43.53
12	The Game of Master-Mind	MMIND	151	46.18
13	Hotline	HOTLINE	134	33.26
14	I-Keyboard	IKEYB	522	38.68
15	The Shortest Path	SHPATH	1190	16.14
16	Sphere in a tetrahedron	TETRA	1050	52.23
17	The Bytelandian Cryptographer (Act I)	CRYPTO1	476	32.35
18	The Bytelandian Cryptographer (Act II)	CRYPTO2	534	40.76
19	The Bytelandian Cryptographer (Act III)	CRYPTO3	99	41.83
20	The Bytelandian Cryptographer (Act IV)	CRYPTO4	29	7.86
22	Triangle From Centroid	TRICENTR	766	39.48
23	Pyramids	PIR	1939	35.41
24	Small factorials	FCTRL2	10963	31.11
25	Pouring water	POUR1	1325	18.88
26	Build the Fence	BSHEEP	701	28.75
27	Sorting Bank Accounts	SBANK	1995	26.50
28	Help the Military Recruitment Office!	HMRO	299	12.70
29	Hash it!	HASHIT	1152	22.79
30	Bytelandian Blingors Network	BLINNET	1029	31.82
31	Fast Multiplication	MUL	662	12.06
32	A Needle in the Haystack	NHAY	1785	31.77
33	Trip	TRIP	558	18.75
34	Run Away	RUNAWAY	169	31.71
35	Equipment Box	EQBOX	549	14.06
36	Secret Code	CODE1	146	28.14
37	The Proper Key	PROPKEY	119	23.39
38	Labyrinth	LABYR1	1435	24.04
39	Piggy-Bank	PIGBANK	2314	32.75
40	Lifting the Stone	STONE	810	21.08
41	Play on Words	WORDS1	1402	18.88
42	Adding Reversed Numbers	ADDREV	16250	48.42
43	Copying Books	BOOKS1	836	25.80
44	Substitution Cipher	SCYPHER	242	16.00
45	Commedia dell Arte	COMMEDIA	152	44.76
47	Skyscraper Floors	SCRAPER	219	15.81
48	Glass Beads	BEADS	1475	40.20
49	Hares and Foxes	HAREFOX	88	15.56
50	Invitation Cards	INCARDS	490	37.51
51	Fake tournament	TOUR	517	21.14
54	Julka	JULKA	6184	29.13