Sphere Online Judge (SPOJ)

list of tutorial problems (unsolved)

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
6655	Lexicographic Order 3		5	12.20
19234	Identity crisis(Medium)	1	10	12.16	17 17
23544	The Prime Explorer	-1	10	12.15
2126	Panel		27	12.07
4869	Flat Land		2	12.00
10494	Celebration	-1	17	11.97	1 1
9127	Graph basics concepts II		6	11.67
12511	CUBE ROOT	1	49	11.59	34 17
16031	3 Fibonacci sum		32	11.29
13238	SAMPLE PROB	-1	6	11.24
28010	Copy Cat		20	11.22
13510	Just multiply !		10	11.00
19915	Leapyear		13	10.98
23691	Next Round		18	10.96
22788	Research Problems	2	6	10.94
25190	Balloons		27	10.82	34 1
10331	Sample	-1	40	10.73
14934	So Close!		16	10.71
27043	Subset Pattern		32	10.71	1 1
8585	Easy Factorials		20	10.38
18040	Tau In World Final		8	10.32
14121	Save the girlfriend		11	10.29
25754	Best Two		34	10.24	1 1
25187	Word Ladder		6	10.17
13951	DRAWING NUMBERS	-1	7	10.13	1 1
14439	Compete or Not	1	6	10.13
7785	ARRAY(EASY)		99	9.99
4190	A plus B	2	101	9.97	1 1
21566	Dictionary		7	9.86
2134	Colorful Cubes		2	9.76
27306	Detecting End Of File - Tutorial		4	9.76
23543	Networking lover Poltu!	1	11	9.52
20750	Remove Duplicates 3		23	9.46
36341	Sum Input-Output Practice		119	9.38
11040	UJ Test 1		12	9.33
8582	Data transfer		6	9.20
34318	Few to cover		9	9.17
21408	2x2 Subgrid Sum Problem (hard)		4	9.09
27299	Find Log	1	126	9.02	1 1
25213	Counting Is Easy		43	8.73	17 17
25491	Hailstone		3	8.57
16669	The Wicked Employer		4	8.54
10552	KAM		10	8.43
31288	Too Late		57	8.27	1 17
527	Just for Fun (Easy)		108	8.18
4245	Place the Numbers I		9	7.98
21523	A multiplied B equal to N		1	7.89
10211	The Collatz Sequence	-1	83	7.78	1
10143	To nisu istine		7	7.69
33792	String	1	22	7.67