Sphere Online Judge (SPOJ)

list of tutorial problems (unsolved)

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
11976	Permutation		26	33.90
12454	Permutation		52	47.86
11387	Perfect Cover		88	33.01	1 1
8224	Perfect Composites		42	18.80
28737	Pen Pine Apple - Apple Pen		19	70.00	1 1
7910	PECOS STRING		29	52.31
4304	Pawn		15	48.94
8931	PATHS( no source code limit)	1	50	54.24
11731	PATENTES	1	21	57.45
37644	Password Cracking		33	31.40
3318	Pascals Travels		45	34.90
16065	Pascal Triangle		29	91.30
35989	Pascal Triangle		10	26.42
11961	Party trouble		70	29.19
28741	Partial Primes	1	16	43.55
9514	Parsing URL	1	26	33.68
40750	Parity Issue		3	16.67
26316	PARESOI		16	29.03	1 1
2126	Panel		27	12.07
23937	Panda and sets		1	1.67
11121	Palindromic Cricketer		25	69.44
25191	Palindrometer		19	32.46
21099	Palindrome Query	2	33	47.76	9 26
13934	Palindrome Pair		15	24.72
14867	PAIRS	1	57	59.15	17 17
26556	Pair Divisible	2	37	23.50	34 34
2020	Painting Points		145	49.85
14336	Packing Boxes	-1	15	27.54
8755	Overlapping Squares	2	208	39.94	17 1
10208	Overestimate		137	38.71
9819	Out of place	1	140	64.82	17 17
12455	Order		22	66.25
24950	Orden Secuencia		16	61.54
32047	Optimal BST		132	92.27
14131	Omitting Redundancy	2	16	32.08	17 34
14749	Omar’s Training I		30	43.30
5228	Old problem		49	30.05
19289	Ohani And Unsolvable Math	1	37	44.21	1 17
25210	Odd Count		28	79.07
18643	Odd		15	47.73
12523	Nuts Frenzy		94	16.33	1 17
24250	Numero Palindromo		26	65.38	1 1
24318	Número Alternantes		26	42.47
19415	Numeral Abbreviation Notation	1	11	40.62
11239	Number Theory (Easy)	2	95	37.05	17 26
12456	NUMBER SERIES		81	44.09
22803	Number Of ways		12	36.84
21862	Number of Paths		25	50.94
34418	Number of divisors of factorial	1	14	62.86
28561	Number of divisors	8	152	13.07	20 20