Sphere Online Judge (SPOJ)

list of tutorial problems (unsolved)

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
5848	Filip		347	66.96
5779	Interleaved Periodic String		42	47.83
5447	Probability One		479	69.51
5387	Interesting determinant		51	34.03
5371	Rational Number		150	43.01
5313	Root of the Problem		188	50.59	1 1
5302	Surprising Strings		28	48.39	17 1
5241	Alchemy		476	54.00
5228	Old problem		49	30.05
5200	Lsu Football		31	85.00
5195	Angry Knights		23	30.34
5194	Robbery	1	284	58.56	17 17
5132	Hello Kitty	6	4382	44.81	5 1
5037	Fibonacci Counting System	-1	28	88.89
5012	Spanish Conjugation	1	79	37.93	17 1
5009	Alphabet Arithmetic		77	30.74
4907	Most Common Letter	1	228	41.39	1 1
4906	Pythagorean Triples	1	1009	60.33	1 1
4897	Meowist Networking	8	897	36.73	14 4
4873	ABC Blocks	1	105	55.36	17 17
4872	Good Sequence		239	70.10
4869	Flat Land		2	12.00
4865	Yupana inca		24	66.67
4854	Primo Kripta		25	36.84
4834	Happy Sequence		248	74.51
4832	Pitagoras y Fermat		28	35.00
4830	Z meet	-1	153	74.06
4788	MCD		97	75.17
4770	Add and Reverse Sums		199	30.04
4768	Cool Numbers		205	37.29
4762	Desde Hasta	1	202	33.60	17 17
4554	Relax! It is just a game	-8	3880	48.48	1 4
4543	Mysterio s Menace		85	39.08
4522	Adding Base36 BigNumbers	1	60	36.06
4500	Helms Deep		123	42.18	1 1
4474	Longest Palindromic Substring	24	1315	21.97	22 20
4422	A Dwarf - N Snow Whites		0	0.00
4304	Pawn		15	48.94
4301	Tables	14	6629	54.01	2 3
4245	Place the Numbers I		9	7.98
4215	Inversions		55	55.87
4207	Mobile (Again)		18	65.00
4205	Highway - MSE07F		8	55.00
4196	Internet Service Providers		45	30.32
4193	Quick answer		5	17.50
4192	Lucky cities		19	28.57
4190	A plus B	2	101	9.97	1 1
4171	DIOPHANTINE		186	42.37
4138	Harry and big doughnuts	4	10675	54.86	3 4
4074	Compile Error		226	58.71	9 1