Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
10571	Soccer Challenge		30	34.78
10574	Soccer Ceremony		26	40.43
10576	Exclusive Security	-1	99	26.77
10581	Ball Stacking Again	1	158	30.86
10585	Searching God		83	25.98
10586	Problems in Moria		41	28.98
10587	Enemies		43	37.50
10589	King		70	29.77
10607	Delivery		33	19.17
10621	MONO		22	15.48
10645	The Rail Network Renovation		100	33.39
10647	Divide And Conquer		13	17.28
10648	DUGDUG		50	25.38
10667	PASIJANS		69	48.52
10675	GENIJALAC		47	51.02
10683	DRIVE		1	1.37
10701	The Lazy Gamer		17	14.00
10799	Happiness at the lowest cost		17	5.44
10800	GAME		25	12.80
10809	Unlock it !		86	30.27
10814	Unique Paths		130	46.01
10822	The Prime Minister	1	29	13.86
10841	Supplying the Suppliers	1	20	40.13
10883	Customs		19	25.96
10945	Foodie Golu		63	28.36
11054	Discords Dilemma		28	26.14
11090	Large banner		33	32.26
11117	Restacking haybales 2012		255	59.48
11157	The Great Escape		83	45.79
11179	Korra in the Spirit World		26	41.24
11276	Adventure		49	38.25
11334	Lucifer Sort		7	1.14	34
11355	SQUARE TO SQUARE		23	18.22
11384	Zoom Operation		4	16.00
11386	Recycled Numbers	1	198	31.86
11405	Just Like the Good Old Days		88	40.78
11407	Tied Down		20	28.24
11440	Unlock it ! Part 2		48	22.88
11458	Ninja		125	15.62
11460	Planning Poker		258	41.88
11474	Totient Game		46	37.65
11493	Goto & labels		64	30.83
11517	GAMING ARENA	1	61	40.34
11521	Dominant Strings		78	34.81
11540	Training		18	26.67
11576	A Famous King’s Trip		25	10.72
11603	Polynomial f(x) to Polynomial h(x)		77	57.39
11718	Boa viagem, Roim		75	16.16
11723	HELP ABHISHEK(version-II)		38	58.19
11808	Max 2214	1	11	11.70