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
29747	Lucky 7, Unlucky 13	3	79	42.15	6 6
16508	Divisors		19	42.11
11110	Easy Longest Increasing Subsequence	72	6416	42.08	4 6
11366	Zoom Operation		11	42.05
22458	SREDNJI		18	42.00
13396	Find Them All		29	41.99	1 1
22309	How to multiply		9	41.94
18295	Problem2		68	41.90	1 6
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
18489	Catch Me If You Can	1	332	41.76	1 1
22430	JOGURT		5	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
26173	Sort an array of integers using a O(n^2) algorithm		26	41.35
11356	TWIN PRIMES	1	35	41.28
14737	Hello Recursion	3	1369	41.26	13 13
4907	Most Common Letter	1	222	41.22	1 1
22122	Victory Day Party		12	41.18
26131	Sum the Decimal-part I	1	76	41.15	17 1
23841	Repeat Your Tasks	-1	25	41.10
26775	Compute The Computation		9	41.10
1023	Arranging Dominoes	1	669	41.07	1 1
32445	COUNT JUMPS	1	89	41.07	4 1
9188	Edit Distance Variant 1		12	41.03
9594	Count the strings		21	40.98	1 1
12239	Natalia Got A Problem		24	40.98
15395	Butters Counting Problem		21	40.98
13880	GO FOR DIAMONDS	2	88	40.98	17 1
15622	Triangles		27	40.85
25219	Greedy Gift Givers	-1	28	40.79
2018	Clique Separation		72	40.76
4171	DIOPHANTINE		180	40.76
17622	Calculate your GPA		484	40.76
8144	Game of 3 cards		43	40.74	1 1
14667	The Invasion	-1	23	40.70
8444	Problem 5	1	229	40.58	34 34
11522	CHOCOLATES	1	82	40.51	1 1
3443	Netiquette		14	40.48
22124	Victory Day Dictionary		10	40.48	1 1
12208	The Chain Reaction		16	40.43
11728	Forest Fires		214	40.41
13391	Binary		59	40.27	1 1
8911	FREE PATHS		89	40.26

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