Sphere Online Judge (SPOJ)

list of tutorial problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
27490	Robber vs Miser		57	54.87
7413	Tile game		56	47.95
10490	Integer palindrome		56	60.95
13216	Progression		56	32.15	1 1
18930	Number of digits		56	55.17
24911	Solo vocales en mayúsculas		56	43.23	1 1
4522	Adding Base36 BigNumbers	1	55	34.33
14119	Factorial Sum	1	55	54.55
14743	Derivation Sequence		55	50.00
15970	Magical Names		55	75.29
18033	The Smurfs	-1	55	61.62	1 1
31288	Too Late		55	8.62	1 17
35773	Sum of Divisors	2	55	22.81	1 1
4215	Inversions		54	55.98
12166	Reverse And Add		54	33.33
13422	THE JUMPING BALL		54	56.74
13436	DILEMMA		54	48.30
14908	Find The Number		54	53.42
15428	Cartman Reverses Strings 200 pts		54	57.55	1 1
15973	Even Odd Digit	1	54	31.17	17 17
24989	Todos Iguales		54	35.68
34170	CHT Practice	3	54	24.42	17 39
9465	Spectrum of colours	-1	53	69.82	50 50
13212	Seconds Apart	1	53	36.72	1 1
24317	Mayor de Tres		53	74.36
26779	The Universe Loves Minimum Steps !		53	44.96
7431	Vikram & Betaal	1	52	68.48	1 1
14982	simple calculation		52	28.53
15751	Kth Largest Candy Packet		52	88.51	34
18192	ASCII 1		52	53.69
22533	An Arithmetic Problem		52	29.95	1 1
15781	Coder Express Le!!		51	48.41
15968	Sorting	-1	51	45.41
18049	Robert Langdon & Sign Queue		51	70.59
25022	RETO MCM	1	51	78.21	1 1
26804	Pyramids	1	51	57.89
8440	Verify N queens		50	17.73
9113	Digibomb!		50	65.71
15985	Sieve Of Erasthosthenes		50	81.94
5387	Interesting determinant		49	46.15
8094	Treasure map		49	95.73
11567	Find the missing card		49	43.31
12511	CUBE ROOT	1	49	12.26	34 17
13393	Dragons		49	43.68	1 1
13650	Adel Challenge		49	42.62
14867	PAIRS	1	49	58.28	17 17
31283	Count The Players		49	25.87
14114	Mysterious Number		48	20.73	17 17
25021	CAPTCHA		48	20.82
25254	CAPTCHA2		48	44.63