Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	USERS	ACC %	DIFFICULTY C I
6804	Cheating or Not	19	15.29
6823	Seller Bob	73	21.72
6827	Last Minute Construction	24	17.36
6831	Two Ball Game	67	28.44
6832	To Score or not to score	46	29.01
6851	Fence	43	24.40
6860	Asistent	25	13.45
6885	Wonkas Oompa-Impa Dilemma	16	22.22
6895	Maximum Edge of Powers of Permutation	12	21.39
6949	PIN	145	28.30	17 34
6951	MP3 Player	42	28.57
6957	Partial Palindrome	3	5.00
6977	Odd Independent Sets	17	51.28
6981	The Least Number	23	24.43
6985	Rearranging Digits	56	22.53
6986	Summing Slopes	61	28.79
6999	Avoiding SOS Grids	69	10.71
7010	Police Business	6	25.00
7023	Cookies	19	28.80
7050	Necklace Decomposition	48	60.61
7100	Back To The Polygon	88	34.80
7193	The Pharaoh Curse	16	21.05
7248	Chess part1	104	23.55
7301	Lucky Controller	11	32.14
7323	Happy Days	47	44.74
7333	Shuffle Music	9	26.67
7336	Mastermind	493	36.24
7337	Shuffling	24	18.09
7378	Manhattan Companies	16	10.96
7387	Airplane Parking	56	23.53
7389	Rating Hazard	25	19.44
7402	Repair Depots	14	43.90
7409	Drawing Quadrilaterals	51	11.46
7427	Jara’s Legacy	85	40.21
7490	Biology	14	5.93
7556	B - Stock Charts	45	40.48
7558	D - Alphabetomials	14	41.46
7559	E - Football Team	9	12.50
7560	F - Interesting Ranges	13	21.33
7563	Hi6	39	16.55	26 26
7566	Expected Cycle Sums	52	47.89
7579	Power Calculus	326	49.33	34 17
7581	The Best Name for Your Baby	13	33.33
7589	Cave Crisis	13	54.84
7599	Optimal Strategy for the ICPC	10	21.15
7627	Driving Direction	14	49.02
7629	Building Ports	45	12.44
7630	SHOPPERS	150	36.75
7632	Architecture	20	24.24
7666	Telecommunications	26	28.30