Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
3587	Prime Again	11	870	16.38	20 15
3591	Patting Heads	3	657	35.35	17 17
3605	Minimum Rotations	15	918	19.09	15 21
3638	Word Counting	7	2640	21.08	10 6
3639	Lucky Numbers	7	730	34.09	13 9
3640	Hanoi Subway System Construction		34	39.60
3641	Earthquakes		25	35.37
3642	Pretty Printing		39	21.71
3643	Traffic Network	89	2111	18.27	18 21
3644	Winning Strategy	1	35	19.74	17 50
3645	Farthest Headquarters		60	26.80
3646	Adventure Tourism		46	14.43
3647	Moebius		2	3.61
3678	Cattle Bruisers		89	26.07
3679	Moo University - Emergency Pizza Order	-1	36	27.05
3693	Maximum Sum	59	6578	42.39	19 18
3713	Primitive Root	6	606	30.50	15 27
3723	Snooker	5	458	50.46	9 27
3724	Rainbow Ride	8	491	35.97	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	632	38.09	26 34
3749	Subset Sums	74	4183	26.58	17 20
3752	JEDNAKOST	12	598	18.41	23 21
3753	GONDOR	4	392	53.29	13 13
3754	MAJMUN	1	77	40.23	17 17
3762	Bread Tree		163	13.62
3763	George	15	527	52.50	19 18
3791	Street	8	667	51.37	10 13
3831	Lubenica	1	202	42.45	17 17
3832	Kruska	4	106	46.38	17 17
3833	Tresnja	1	128	52.69	42 42
3861	Laser Phones	31	1407	28.72	20 18
3863	Area of circles	1	311	29.50	34 34
3865	Reljef	3	93	38.89	26 17
3866	Finding Palindromes	7	253	19.33	19 23
3867	Who is The Boss		169	25.29
3868	Total Flow	11	1397	36.29	14 13
3870	Military Story	3	284	28.75	21 12
3871	GCD Extreme	81	2998	29.53	19 26
3872	Party At School		56	24.62
3876	Tablica	1	206	58.65
3877	Cvjetici	18	983	48.63	12 21
3878	Rectangles Perimeter	58	2698	49.86	12 14
3881	Majstor	1	734	53.95	4 4
3882	Cijevi	5	260	38.04	30 14
3883	LATGACH3	55	3194	56.56	10 20
3884	When (You Believe)		23	8.66
3885	Coins Game	92	5445	45.42	10 13