Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	USERS	ACC %	DIFFICULTY C I
10506	Prendonians	49	25.98
10507	Cheese-rolling World Cup	56	32.86
10508	Buttons	47	24.24
10538	Derp	58	38.61
10571	Soccer Challenge	30	40.40
10574	Soccer Ceremony	25	41.67
10585	Searching God	83	25.98
10586	Problems in Moria	38	27.56
10587	Enemies	39	35.21
10589	King	70	29.77
10607	Delivery	32	19.61
10621	MONO	22	16.00
10640	The Wild Wizard	97	26.91	1 1
10645	The Rail Network Renovation	97	33.46
10647	Divide And Conquer	12	17.11
10648	DUGDUG	49	25.15
10667	PASIJANS	68	48.21
10675	GENIJALAC	47	52.00
10683	DRIVE	1	1.61
10701	The Lazy Gamer	16	13.42
10799	Happiness at the lowest cost	16	5.23
10800	GAME	22	12.22
10809	Unlock it !	85	30.10
10814	Unique Paths	128	46.06
10877	Decoys and Diversions	45	17.97	9 17
10883	Customs	15	22.68
10919	I Hate Parenthesis	95	29.82	17 1
10945	Foodie Golu	63	28.53
11054	Discords Dilemma	27	26.47
11090	Large banner	32	31.71
11105	Email ID	74	21.78	1 1
11117	Restacking haybales 2012	239	57.89
11157	The Great Escape	78	45.19
11179	Korra in the Spirit World	26	41.24
11202	Number Theory	36	31.35	39 39
11276	Adventure	46	36.81
11334	Lucifer Sort	7	1.20	34
11355	SQUARE TO SQUARE	23	18.29
11384	Zoom Operation	4	16.00
11405	Just Like the Good Old Days	86	40.39
11407	Tied Down	18	26.83
11440	Unlock it ! Part 2	46	21.14
11444	MAXOR	109	36.02	9 26
11458	Ninja	123	15.48
11460	Planning Poker	256	41.97
11474	Totient Game	43	36.89
11482	Count on a trie	63	17.99	42 50
11493	Goto & labels	63	30.45
11496	Just the distance	17	10.42	17 17
11521	Dominant Strings	76	33.85