Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	CODE	USERS	ACC %
1	Life, the Universe, and Everything	TEST	42585	35.00
2	Prime Generator	PRIME1	10545	12.47
3	Substring Check (Bug Funny)	SBSTR1	367	11.24
4	Transform the Expression	ONP	9383	50.59
5	The Next Palindrome	PALIN	6245	15.21
6	Simple Arithmetics	ARITH	1207	12.80
7	The Bulk!	BULK	240	29.05
8	Complete the Sequence!	CMPLS	1186	35.42
9	Direct Visibility	DIRVS	164	18.57
10	Complicated Expressions	CMEXPR	504	27.87
11	Factorial	FCTRL	14015	43.55
12	The Game of Master-Mind	MMIND	151	45.95
13	Hotline	HOTLINE	134	33.26
14	I-Keyboard	IKEYB	529	38.29
15	The Shortest Path	SHPATH	1213	16.15
16	Sphere in a tetrahedron	TETRA	1077	52.31
17	The Bytelandian Cryptographer (Act I)	CRYPTO1	480	32.36
18	The Bytelandian Cryptographer (Act II)	CRYPTO2	537	40.77
19	The Bytelandian Cryptographer (Act III)	CRYPTO3	99	41.83
20	The Bytelandian Cryptographer (Act IV)	CRYPTO4	29	7.83
22	Triangle From Centroid	TRICENTR	777	39.68
23	Pyramids	PIR	1982	35.55
24	Small factorials	FCTRL2	11218	31.16
25	Pouring water	POUR1	1359	18.90
26	Build the Fence	BSHEEP	713	28.71
27	Sorting Bank Accounts	SBANK	2039	26.36
28	Help the Military Recruitment Office!	HMRO	302	12.74
29	Hash it!	HASHIT	1168	22.71
30	Bytelandian Blingors Network	BLINNET	1051	31.90
31	Fast Multiplication	MUL	682	12.01
32	A Needle in the Haystack	NHAY	1821	31.71
33	Trip	TRIP	566	18.77
34	Run Away	RUNAWAY	171	31.65
35	Equipment Box	EQBOX	557	14.04
36	Secret Code	CODE1	148	28.27
37	The Proper Key	PROPKEY	119	23.26
38	Labyrinth	LABYR1	1487	24.18
39	Piggy-Bank	PIGBANK	2354	32.73
40	Lifting the Stone	STONE	826	21.15
41	Play on Words	WORDS1	1414	18.84
42	Adding Reversed Numbers	ADDREV	16542	48.50
43	Copying Books	BOOKS1	854	26.03
44	Substitution Cipher	SCYPHER	241	15.92
45	Commedia dell Arte	COMMEDIA	152	44.76
47	Skyscraper Floors	SCRAPER	220	15.67
48	Glass Beads	BEADS	1511	40.31
49	Hares and Foxes	HAREFOX	88	15.52
50	Invitation Cards	INCARDS	502	37.87
51	Fake tournament	TOUR	520	21.09
54	Julka	JULKA	6306	29.12