Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	USERS	ACC %	DIFFICULTY C I
10265	Subdivision of the kingdom	33	33.55
10377	project groups	128	50.69	34 34
10419	Polish Language	95	24.95
10421	Run, Snipe, Run	73	30.00
10425	Security System	25	54.24
10437	Quadrilaterals	73	30.28
10439	Walking Robot	110	46.11	34 34
10440	Friends	32	20.25
10443	Bridges	1	7.14
10444	Coding	97	35.58
10447	Contaminated City	69	13.63
10449	Resource Management	15	25.96
10450	Amoeba	98	17.32
10451	Stun Boosting	17	27.38
10454	Greens Land	96	28.21
10461	The magical escape	32	53.33
10465	One Theorem, One Year	46	42.86
10476	Fair bases	37	35.71
10506	Prendonians	50	29.35
10507	Cheese-rolling World Cup	53	33.51
10508	Buttons	45	24.77
10538	Derp	55	38.04
10571	Soccer Challenge	30	46.51
10574	Soccer Ceremony	19	39.44
10585	Searching God	82	26.37
10586	Problems in Moria	29	28.70
10587	Enemies	35	34.07
10589	King	65	28.00
10607	Delivery	34	27.36
10621	MONO	22	16.44
10640	The Wild Wizard	96	26.68	1 1
10645	The Rail Network Renovation	94	33.85
10647	Divide And Conquer	11	19.35
10648	DUGDUG	48	25.63
10667	PASIJANS	65	47.85
10675	GENIJALAC	46	50.52
10683	DRIVE	1	2.50
10701	The Lazy Gamer	16	13.61
10799	Happiness at the lowest cost	11	4.65
10800	GAME	21	12.64
10809	Unlock it !	83	30.99
10814	Unique Paths	123	46.00
10877	Decoys and Diversions	45	18.03	9 17
10883	Customs	14	31.25
10919	I Hate Parenthesis	92	29.14	17 1
10945	Foodie Golu	61	28.31
11054	Discords Dilemma	23	27.52
11090	Large banner	27	33.33
11105	Email ID	74	22.92	1 1
11117	Restacking haybales 2012	173	52.99