Sphere Online Judge (SPOJ)

list of tutorial problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
16669	The Wicked Employer		4	8.54
25491	Hailstone		3	8.57
25213	Counting Is Easy		43	8.73	17 17
27299	Find Log	1	126	9.02	1 1
21408	2x2 Subgrid Sum Problem (hard)		4	9.09
34318	Few to cover		9	9.17
8582	Data transfer		6	9.20
11040	UJ Test 1		12	9.33
36341	Sum Input-Output Practice		119	9.38
20750	Remove Duplicates 3		23	9.46
23543	Networking lover Poltu!	1	11	9.52
2134	Colorful Cubes		2	9.76
27306	Detecting End Of File - Tutorial		4	9.76
21566	Dictionary		7	9.86
4190	A plus B	2	101	9.97	1 1
7785	ARRAY(EASY)		99	9.99
13951	DRAWING NUMBERS	-1	7	10.13	1 1
14439	Compete or Not	1	6	10.13
25187	Word Ladder		6	10.17
25754	Best Two		34	10.24	1 1
14121	Save the girlfriend		11	10.29
18040	Tau In World Final		8	10.32
8585	Easy Factorials		20	10.38
14934	So Close!		16	10.71
27043	Subset Pattern		32	10.71	1 1
10331	Sample	-1	40	10.73
25190	Balloons		27	10.82	34 1
22788	Research Problems	2	6	10.94
23691	Next Round		18	10.96
19915	Leapyear		13	10.98
13510	Just multiply !		10	11.00
28010	Copy Cat		20	11.22
13238	SAMPLE PROB	-1	6	11.24
16031	3 Fibonacci sum		32	11.29
12511	CUBE ROOT	1	49	11.59	34 17
9127	Graph basics concepts II		6	11.67
10494	Celebration	-1	17	11.97	1 1
4869	Flat Land		2	12.00
2126	Panel		27	12.07
23544	The Prime Explorer	-1	10	12.15
19234	Identity crisis(Medium)	1	10	12.16	17 17
6655	Lexicographic Order 3		5	12.20
22787	Simple Polygon		5	12.50
36961	Vùng bao lớn nhất		21	12.55
28561	Number of divisors	8	152	13.07	20 20
34625	Maximum K in a Window		9	13.08
27271	Collecting Coins	4	184	13.20	9 20
30784	Ada and Pear		14	13.42
22793	Rectangular Spirals		6	13.43
1392	Sum of Factors	2	346	13.45	1 1