Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
10647	Divide And Conquer		12	16.25
10648	DUGDUG		49	25.15
10667	PASIJANS		68	48.21
10675	GENIJALAC		47	52.00
10683	DRIVE		1	1.45
10701	The Lazy Gamer		16	13.42
10799	Happiness at the lowest cost		16	5.23
10800	GAME		24	12.65
10809	Unlock it !		85	30.10
10814	Unique Paths		129	45.89
10822	The Prime Minister	1	29	13.76
10841	Supplying the Suppliers	1	19	39.94
10883	Customs		17	24.27
10945	Foodie Golu		63	28.53
11054	Discords Dilemma		27	26.32
11090	Large banner		32	31.71
11117	Restacking haybales 2012		241	57.95
11157	The Great Escape		82	45.65
11179	Korra in the Spirit World		26	41.24
11276	Adventure		48	37.91
11334	Lucifer Sort		7	1.15	34
11355	SQUARE TO SQUARE		23	18.29
11384	Zoom Operation		4	16.00
11386	Recycled Numbers	1	197	31.78
11405	Just Like the Good Old Days		87	40.58
11407	Tied Down		19	27.38
11440	Unlock it ! Part 2		46	21.14
11458	Ninja		124	15.55
11460	Planning Poker		257	41.99
11474	Totient Game		44	37.14
11493	Goto & labels		64	30.64
11517	GAMING ARENA	1	60	40.09
11521	Dominant Strings		77	35.00
11540	Training		17	29.23
11576	A Famous King’s Trip		23	9.46
11603	Polynomial f(x) to Polynomial h(x)		76	57.29
11718	Boa viagem, Roim		73	15.98
11723	HELP ABHISHEK(version-II)		35	57.24
11808	Max 2214	1	11	11.90
11813	Count weighted paths	1	21	40.74
11871	Captain Qs Treasure		13	63.64
11873	Round Trip		9	8.70
11885	Drawing Triangles with Brainf##k		46	33.86
11900	Spelling Suggestion		7	11.59
11904	A Classic Myth - Flatland Superhero		11	41.18
11905	Tree Count		44	38.89
11935	Decorating the Palace		22	39.68
11956	Addicted		57	57.53
11963	Packing Rectangles		39	51.11
11984	Dome of Circus		21	45.95