Sphere Online Judge (SPOJ)

list of tutorial problems (unsolved)

ID	NAME	QUALITY	USERS	ACC %
11976	Permutation		26	33.90
11980	Sequence		322	29.86
11989	Factorial large		23	20.26
11990	Measuring Water		101	27.85
11995	Family Problem		24	24.80
11996	Medal Tally	1	27	54.24
12071	Point Blank		39	35.29
12072	Playing With Bits		177	54.42
12075	Encryption		9	31.82
12077	Secret Code		8	19.23
12078	Picking Weights		10	20.29
12081	Picture Perfect	1	21	36.71
12083	Appetizer		125	51.05
12092	Dessert		120	45.83
12100	Main Course		8	16.67
12101	Entrée		149	50.23
12111	FirstProblem		114	59.40
12165	Encrypted String		13	13.83
12166	Reverse And Add		60	34.39
12167	Fibonacci starters		33	40.91
12168	APGP Tutorial		29	22.22
12169	General Number Series		63	30.30
12208	The Chain Reaction		20	36.92
12239	Natalia Got A Problem		24	40.32
12271	Speed test - Pyramid version		32	81.69
12272	Speed test - Cube version		34	71.05
12275	Meeting and Dating		153	35.19
12282	Word or number (easiest 2)	-1	222	67.41
12289	Grid Travel		72	27.90
12395	Maximizing the equation		84	40.47
12410	No more Johnny		62	35.89
12454	Permutation		52	47.86
12455	Order		22	66.25
12456	NUMBER SERIES		81	44.09
12465	Shared Letters		96	68.83
12509	STRING PROBLEM		43	43.12
12510	JUMPING DORA		90	36.31
12607	Missing one		27	91.53
12608	Switch	1	33	81.82
12648	The Last Exam		15	61.54
12650	Even and Odd	1	66	35.04
12793	The power of two		110	51.35
12801	Browsing History		51	40.88
12823	Print Big Binary Numbers		19	58.23
12910	Addicted Numbers		148	29.57
13085	Game		160	68.70
13088	Free Palestine	-1	137	29.61
13115	Julius Caesar Cipher		24	31.82
13153	Fast Division		119	49.57
13238	SAMPLE PROB	-1	6	11.24