Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
3587	Prime Again	11	868	16.36	20 15
3591	Patting Heads	3	655	35.31	17 17
3605	Minimum Rotations	15	919	19.12	15 21
3638	Word Counting	7	2639	21.05	10 6
3639	Lucky Numbers	7	730	33.96	13 9
3640	Hanoi Subway System Construction		32	38.38
3641	Earthquakes		24	36.49
3642	Pretty Printing		39	22.40
3643	Traffic Network	89	2109	18.27	18 21
3644	Winning Strategy	1	35	31.08	17 50
3645	Farthest Headquarters		60	26.80
3646	Adventure Tourism		46	14.84
3647	Moebius		1	2.35
3678	Cattle Bruisers		88	25.91
3679	Moo University - Emergency Pizza Order	-1	35	26.83
3693	Maximum Sum	59	6539	42.33	19 18
3713	Primitive Root	6	605	30.52	15 27
3723	Snooker	5	458	50.46	9 27
3724	Rainbow Ride	8	489	35.86	19 19
3725	Taming a T-REX	1	148	44.58	34
3732	Slikar	1	210	51.78	28 17
3733	Trezor		104	52.19
3734	Periodni	2	622	37.85	26 34
3749	Subset Sums	74	4148	26.50	17 20
3752	JEDNAKOST	12	598	18.42	23 21
3753	GONDOR	4	387	53.39	13 13
3754	MAJMUN	1	74	42.02	17 17
3762	Bread Tree		163	13.58
3763	George	15	525	52.41	19 18
3791	Street	8	667	51.16	10 13
3831	Lubenica	1	202	42.35	17 17
3832	Kruska	4	105	45.49	17 17
3833	Tresnja	1	128	52.69	42 42
3861	Laser Phones	31	1398	28.63	20 18
3863	Area of circles	1	311	29.78	34 34
3865	Reljef	3	93	38.89	26 17
3866	Finding Palindromes	7	252	19.47	19 23
3867	Who is The Boss		169	25.21
3868	Total Flow	11	1394	36.25	14 13
3870	Military Story	3	285	28.84	21 12
3871	GCD Extreme	81	2933	29.59	19 26
3872	Party At School		53	23.37
3876	Tablica	1	205	59.13
3877	Cvjetici	18	983	48.60	12 21
3878	Rectangles Perimeter	58	2697	49.85	12 14
3881	Majstor	1	734	53.99	4 4
3882	Cijevi	5	260	37.97	30 14
3883	LATGACH3	55	3188	56.55	10 20
3884	When (You Believe)		23	8.92
3885	Coins Game	92	5394	45.53	10 13