Sphere Online Judge (SPOJ)

list of classical problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
3587	Prime Again	11	847	16.33	20 15
3591	Patting Heads	3	650	35.28	17 17
3605	Minimum Rotations	15	910	19.05	15 21
3638	Word Counting	7	2632	21.07	10 6
3639	Lucky Numbers	7	729	34.10	13 9
3640	Hanoi Subway System Construction		32	41.75
3641	Earthquakes		23	37.68
3642	Pretty Printing		39	24.38
3643	Traffic Network	89	2101	18.26	18 21
3644	Winning Strategy	1	35	38.33	17 50
3645	Farthest Headquarters		56	25.93
3646	Adventure Tourism		45	15.69
3647	Moebius		1	2.56
3678	Cattle Bruisers		87	25.75
3679	Moo University - Emergency Pizza Order	-1	35	26.96
3693	Maximum Sum	58	6483	42.25	19 18
3713	Primitive Root	6	597	30.49	15 27
3723	Snooker	5	451	50.14	9 27
3724	Rainbow Ride	8	486	35.87	19 19
3725	Taming a T-REX	1	145	44.58	34
3732	Slikar	1	208	51.60	28 17
3733	Trezor		102	52.72
3734	Periodni	2	580	36.98	26 34
3749	Subset Sums	74	4082	26.39	17 20
3752	JEDNAKOST	12	596	18.41	23 21
3753	GONDOR	4	382	53.06	13 13
3754	MAJMUN	1	72	44.29	17 17
3762	Bread Tree		162	13.54
3763	George	15	522	52.29	19 18
3791	Street	8	666	51.38	10 13
3831	Lubenica	1	199	42.06	17 17
3832	Kruska	4	104	45.79	17 17
3833	Tresnja	1	126	52.36	42 42
3861	Laser Phones	31	1367	28.66	20 18
3863	Area of circles	1	305	29.67	34 34
3865	Reljef	3	94	39.22	26 17
3866	Finding Palindromes	7	246	19.42	19 23
3867	Who is The Boss		167	25.03
3868	Total Flow	11	1387	36.19	14 13
3870	Military Story	3	282	28.76	21 12
3871	GCD Extreme	80	2768	29.61	19 26
3872	Party At School		50	23.87
3876	Tablica	1	205	59.13
3877	Cvjetici	18	979	48.56	12 21
3878	Rectangles Perimeter	58	2694	49.81	12 14
3881	Majstor	1	733	53.96	4 4
3882	Cijevi	5	259	37.70	30 14
3883	LATGACH3	55	3179	56.52	10 20
3884	When (You Believe)		23	8.98
3885	Coins Game	92	5285	45.58	10 13