Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
3587	Prime Again	11	867	16.36	20 15
3591	Patting Heads	3	654	35.29	17 17
3605	Minimum Rotations	15	916	19.10	15 21
3638	Word Counting	7	2638	21.06	10 6
3639	Lucky Numbers	7	729	34.07	13 9
3640	Hanoi Subway System Construction		32	38.38
3641	Earthquakes		24	38.57
3642	Pretty Printing		38	23.01
3643	Traffic Network	89	2108	18.26	18 21
3644	Winning Strategy	1	35	35.94	17 50
3645	Farthest Headquarters		59	26.70
3646	Adventure Tourism		45	14.66
3647	Moebius		1	2.44
3678	Cattle Bruisers		87	25.75
3679	Moo University - Emergency Pizza Order	-1	35	26.96
3693	Maximum Sum	59	6536	42.32	19 18
3713	Primitive Root	6	604	30.47	15 27
3723	Snooker	5	457	50.41	9 27
3724	Rainbow Ride	8	487	35.91	19 19
3725	Taming a T-REX	1	147	44.44	34
3732	Slikar	1	209	51.69	28 17
3733	Trezor		103	52.87
3734	Periodni	2	619	37.76	26 34
3749	Subset Sums	74	4139	26.46	17 20
3752	JEDNAKOST	12	597	18.41	23 21
3753	GONDOR	4	386	53.33	13 13
3754	MAJMUN	1	74	44.64	17 17
3762	Bread Tree		162	13.54
3763	George	15	524	52.38	19 18
3791	Street	8	666	51.35	10 13
3831	Lubenica	1	201	42.26	17 17
3832	Kruska	4	105	46.15	17 17
3833	Tresnja	1	127	52.35	42 42
3861	Laser Phones	31	1397	28.62	20 18
3863	Area of circles	1	309	29.72	34 34
3865	Reljef	3	94	39.22	26 17
3866	Finding Palindromes	7	251	19.43	19 23
3867	Who is The Boss		168	25.12
3868	Total Flow	11	1393	36.25	14 13
3870	Military Story	3	283	28.74	21 12
3871	GCD Extreme	81	2918	29.63	19 26
3872	Party At School		52	23.96
3876	Tablica	1	205	59.13
3877	Cvjetici	18	982	48.61	12 21
3878	Rectangles Perimeter	58	2696	49.84	12 14
3881	Majstor	1	734	53.99	4 4
3882	Cijevi	5	260	38.01	30 14
3883	LATGACH3	55	3187	56.55	10 20
3884	When (You Believe)		23	8.92
3885	Coins Game	92	5386	45.53	10 13