Sphere Online Judge (SPOJ)

list of tutorial problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
26687	Guess The Maximum	2	111	42.18	1 9
14337	Luhn Algorithm		30	42.17
16508	Divisors		19	42.11
26173	Sort an array of integers using a O(n^2) algorithm		25	42.11
11110	Easy Longest Increasing Subsequence	72	6305	42.06	4 6
11366	Zoom Operation		11	42.05
13396	Find Them All		29	41.99	1 1
9594	Count the strings		20	41.94	1 1
22309	How to multiply		9	41.94
15969	SWEET PAIRS		21	41.82
34479	Möbius function zero distribution	4	15	41.82	6 17
3378	Mirrored Pairs	2	3971	41.80	5 1
19995	Moon Safari (easy)	3	66	41.76	12 17
18489	Catch Me If You Can	1	330	41.72	1 1
18533	Vowel Density		9	41.67
8373	AVION		1438	41.55
6524	Find the group		47	41.53
26142	Vampire and his Holy Numbers	1	32	41.51	17 17
10364	TREE SHAPES		23	41.43
20763	Journey of nikki	1	19	41.38
11356	TWIN PRIMES	1	35	41.28
4907	Most Common Letter	1	222	41.22	1 1
13880	GO FOR DIAMONDS	1	88	41.20	17 1
22122	Victory Day Party		12	41.18
26131	Sum the Decimal-part I	1	76	41.15	17 1
26775	Compute The Computation		9	41.10
32445	COUNT JUMPS	1	89	41.07	4 1
1023	Arranging Dominoes	1	668	41.05	1 1
9188	Edit Distance Variant 1		12	41.03
12239	Natalia Got A Problem		24	40.98
14737	Hello Recursion	3	1298	40.98	13 13
8144	Game of 3 cards		42	40.95	1 1
15622	Triangles		27	40.85
22458	SREDNJI		17	40.82
25219	Greedy Gift Givers	-1	28	40.79
4171	DIOPHANTINE		180	40.76
7863	Four Chips (Easy)		9	40.74
8444	Problem 5	1	229	40.58	34 34
24316	Un segundo después		27	40.54
3443	Netiquette		14	40.48
22124	Victory Day Dictionary		10	40.48	1 1
2018	Clique Separation		71	40.44
12208	The Chain Reaction		16	40.43
11728	Forest Fires		214	40.41
26690	Almost Prime Numbers	4	194	40.32	1 1
17622	Calculate your GPA		484	40.29
23841	Repeat Your Tasks	-1	24	40.28
13391	Binary		59	40.27	1 1
8911	FREE PATHS		89	40.26
16107	MIKE AND RACHAEL		33	40.22

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