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	653	35.28	17 17
3605	Minimum Rotations	15	912	19.07	15 21
3638	Word Counting	7	2637	21.05	10 6
3639	Lucky Numbers	7	729	34.07	13 9
3640	Hanoi Subway System Construction		31	37.76
3641	Earthquakes		23	37.68
3642	Pretty Printing		39	24.38
3643	Traffic Network	89	2107	18.26	18 21
3644	Winning Strategy	1	35	38.33	17 50
3645	Farthest Headquarters		56	25.93
3646	Adventure Tourism		45	14.85
3647	Moebius		1	2.56
3678	Cattle Bruisers		87	25.75
3679	Moo University - Emergency Pizza Order	-1	35	26.96
3693	Maximum Sum	59	6522	42.31	19 18
3713	Primitive Root	6	601	30.45	15 27
3723	Snooker	5	452	50.23	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		102	52.72
3734	Periodni	2	609	37.56	26 34
3749	Subset Sums	74	4123	26.41	17 20
3752	JEDNAKOST	12	597	18.41	23 21
3753	GONDOR	4	386	53.33	13 13
3754	MAJMUN	1	74	45.05	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	199	42.06	17 17
3832	Kruska	4	104	45.79	17 17
3833	Tresnja	1	127	52.54	42 42
3861	Laser Phones	31	1395	28.58	20 18
3863	Area of circles	1	309	29.72	34 34
3865	Reljef	3	94	39.22	26 17
3866	Finding Palindromes	7	249	19.39	19 23
3867	Who is The Boss		167	25.03
3868	Total Flow	11	1390	36.24	14 13
3870	Military Story	3	283	28.76	21 12
3871	GCD Extreme	81	2893	29.69	19 26
3872	Party At School		50	23.87
3876	Tablica	1	205	59.13
3877	Cvjetici	18	981	48.60	12 21
3878	Rectangles Perimeter	58	2695	49.83	12 14
3881	Majstor	1	734	53.99	4 4
3882	Cijevi	5	260	38.01	30 14
3883	LATGACH3	55	3185	56.54	10 20
3884	When (You Believe)		23	8.98
3885	Coins Game	92	5363	45.60	10 13