Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	USERS	ACC %	DIFFICULTY C I
10447	Contaminated City	69	13.63
10449	Resource Management	15	25.23
10450	Amoeba	98	17.15
10451	Stun Boosting	17	27.38
10454	Greens Land	96	28.21
10461	The magical escape	32	53.33
10465	One Theorem, One Year	45	42.08
10476	Fair bases	37	33.11
10506	Prendonians	50	29.35
10507	Cheese-rolling World Cup	54	33.50
10508	Buttons	45	24.77
10538	Derp	55	38.04
10571	Soccer Challenge	30	45.98
10574	Soccer Ceremony	19	39.44
10585	Searching God	82	26.37
10586	Problems in Moria	29	28.70
10587	Enemies	35	33.82
10589	King	67	28.22
10607	Delivery	32	25.64
10621	MONO	22	16.44
10640	The Wild Wizard	96	26.65	1 1
10645	The Rail Network Renovation	94	33.85
10647	Divide And Conquer	11	16.90
10648	DUGDUG	49	25.71
10667	PASIJANS	66	48.17
10675	GENIJALAC	46	50.52
10683	DRIVE	1	2.50
10701	The Lazy Gamer	16	13.61
10799	Happiness at the lowest cost	14	5.61
10800	GAME	21	12.64
10809	Unlock it !	82	30.26
10814	Unique Paths	125	46.67
10877	Decoys and Diversions	45	18.03	9 17
10883	Customs	14	31.25
10919	I Hate Parenthesis	92	29.33	17 1
10945	Foodie Golu	62	28.14
11054	Discords Dilemma	23	27.52
11090	Large banner	31	33.63
11105	Email ID	74	22.92	1 1
11117	Restacking haybales 2012	235	58.41
11157	The Great Escape	78	45.43
11179	Korra in the Spirit World	26	41.24
11202	Number Theory	33	31.21	39 39
11276	Adventure	44	37.36
11334	Lucifer Sort	7	7.17	34
11355	SQUARE TO SQUARE	23	18.43
11384	Zoom Operation	4	20.00
11405	Just Like the Good Old Days	84	40.07
11407	Tied Down	18	32.35
11440	Unlock it ! Part 2	45	21.02