Sphere Online Judge (SPOJ)

list of tutorial problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
6524	Find the group		54	43.98
11567	Find the missing card		54	45.51
13650	Adel Challenge		54	44.62
15968	Sorting	-1	54	47.00
22262	Run Length Encoding	1	54	35.42	1 9
22533	An Arithmetic Problem		54	29.95	1 1
25021	CAPTCHA		54	22.22
4215	Inversions		55	55.87
7431	Vikram & Betaal	1	55	69.15	1 1
9113	Digibomb!		55	66.38
13212	Seconds Apart	1	55	37.14	1 1
18049	Robert Langdon & Sign Queue		55	73.12
18192	ASCII 1		55	54.25
26804	Pyramids	1	55	59.05
9465	Spectrum of colours	-1	56	65.81	50 50
14982	simple calculation		56	29.06
15781	Coder Express Le!!		56	48.44
15970	Magical Names		56	72.84
15973	Even Odd Digit	1	56	30.97	17 17
18930	Number of digits		56	55.23
35005	Classic Sequence Sum	4	56	50.00	27 14
11319	TARANIAMITKAUSHIK	-1	57	47.66
14867	PAIRS	1	57	59.15	17 17
26779	The Universe Loves Minimum Steps !		57	45.93
31288	Too Late		57	8.27	1 17
13436	DILEMMA		58	49.67
35773	Sum of Divisors	2	58	22.22	1 1
13422	THE JUMPING BALL		59	58.22
14908	Find The Number		59	56.46
15388	Easy One For Cartman		59	56.03
15428	Cartman Reverses Strings 200 pts		59	60.18	1 1
18033	The Smurfs	-1	59	63.46	1 1
24317	Mayor de Tres		59	76.19
24911	Solo vocales en mayúsculas		59	45.00	1 1
34170	CHT Practice	3	59	22.53	17 34
4522	Adding Base36 BigNumbers	1	60	36.06
10490	Integer palindrome		60	61.82
12166	Reverse And Add		60	34.39
13216	Progression		60	32.79	1 1
13883	ZEROES IN RANGE	2	60	19.49	26 42
14091	Mighty Powers		60	56.52
14743	Derivation Sequence		60	51.80
24989	Todos Iguales		60	37.50
27490	Robber vs Miser		60	55.37
7413	Tile game		61	49.01
13213	Rectangle Intersection	1	61	17.87	1 1
14119	Factorial Sum	1	61	56.69
22536	Prisoners	1	61	64.94	1 1
12410	No more Johnny		62	35.89
14124	S Number		62	50.00