Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
34021	Prefix Square Free Words		10	12.04
35631	Moon Safari (Extreme)	3	10	33.70	45 45
36668	Not So Blind Escape	2	10	30.12	34 42
41834	Anagrams and GCD		10	6.08
2144	K Edge-disjoint Branchings		9	12.35
4008	Con Voi		9	57.69
7333	Shuffle Music		9	26.67
7559	E - Football Team		9	12.50
9645	Joy of CompuTenis		9	15.38
10074	Genetics		9	33.33
11873	Round Trip		9	8.70
12056	Nubulsa Expo		9	8.57
13223	The BrainFast Processing! Classical version		9	38.75	50 17
13591	Factor y Hell		9	18.64	50 34
15252	Humans Life Code		9	47.22
15460	Selling Art		9	12.50
19133	Base Conversion	1	9	11.46	50 34
22177	RajaRani	3	9	8.33	17 17
27097	Longest Rivers		9	16.46
27494	Happiness	1	9	14.78	50 50
34353	Smelly Toilets	1	9	16.95
34481	Galactic Division	2	9	6.67
36704	Projectile Motion	2	9	5.73	34 26
41890	Anagrams and Divisibility	1	9	5.17	34 34
205	Icerink		8	12.22
3463	Robintron		8	22.06
4189	Landing	1	8	4.08	50 50
4278	Battlefield		8	38.89
8657	The Bovine Accordion and Banjo Orchestra		8	22.81
11900	Spelling Suggestion		8	12.86
12803	Graph		8	15.00	50 50
13816	Pheversos Game	1	8	36.03	17 34
13926	Flipping Slipping of grids	1	8	19.23	17 50
14991	Your Rank is Pure (EXTREME ver)		8	25.74
19684	Symmetric matrix		8	21.35
19971	100pct failure in 72 hours	1	8	42.86	17 50
25528	LUTRIJA	1	8	11.76	17 17
36534	Heroes		8	29.63
41823	Martia Auris 3020		8	45.83
275	The Water Ringroad		7	19.15
1797	Cardsharper	2	7	22.06	34 45
2944	Emmons		7	7.19
3420	Falling Ice		7	12.50
3482	Alias		7	31.82
8285	Rectangles in a Matrix	2	7	17.11	17 34
8478	Ancient Pocket Calculator		7	4.25
8846	Fudan Extracurricular Lives		7	25.00
11334	Lucifer Sort		7	1.14	34
11946	Zig-Zag Permutation 2	1	7	25.49	26 34
12806	Blackjack		7	16.00