Sphere Online Judge (SPOJ)

list of classical problems (unsolved)

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
1681	Cylinder	2	927	38.24	9 26
3476	Deposit	2	235	38.24	17 21
1475	Play with Digit Seven	3	136	38.22	28 12
21104	Jarin Loves New Task	6	49	38.20	21 21
3882	Cijevi	5	261	38.20	30 14
101	Fishmonger	48	2318	38.19	17 21
34247	Agent prefix	-5	59	38.18	1 1
13002	For Loops Challenge	2	282	38.12	34 17
1472	Tom and Jerry		67	38.12	1 1
5466	Electronic queue	5	166	38.11	13 21
1964	Tree cut		149	38.10
19143	TRISQRS		172	38.08	28 34
2140	(un)Fair Play		75	38.08
401	Translations		137	38.07	17 34
48	Glass Beads	29	3476	38.07	15 18
3979	Whirligig number	8	1030	38.07	10 15
21357	Crucial Equation	80	6394	38.06	4 9
9576	Dynamic Graph Connectivity	8	328	38.05	41 38
14543	Range Sum	26	1014	38.05	11 12
174	Paint templates	1	60	38.04	9 17
34621	NARUTO AND HILLS	8	48	38.03	20 15
25458	Boxes	4	98	38.02	38 38
7762	Electric Needs	1	25	38.00	34 17
21461	Field	7	281	37.99	12 10
13925	ZEROES IN RANGE V2	2	244	37.97	23 17
2047	Stone Removing Game	-1	133	37.96
19139	Boiling Vegetables		31	37.96
1460	A Simple Calculator in the Galaxy		35	37.96	34
13047	Saruman of Many Colours	2	403	37.94	9 17
6732	Camels		88	37.93
13545	Room Change	1	142	37.92	17 17
15736	Breaking String	18	777	37.92	17 28
21643	Unhappy Numbers	7	53	37.91	31 31
17247	Digit Sum	54	3885	37.91	18 22
8841	Avaricious Maryanna	1	77	37.90
7002	Buildings	5	81	37.90	21 30
4097	Locomotive		35	37.89
8421	Fun With Inequalities		144	37.89	17 17
26695	Atul and Aastha Chronicles 2		146	37.89	11 9
1839	The Bookcase	2	131	37.88	17 34
10568	Graph Cut	4	112	37.86	9 9
32952	Ada and Football	3	237	37.85	45 39
12260	Devlali Numbers	13	726	37.85	20 14
300	Cable TV Network	2	756	37.84	24 30
3380	Tourist	28	1170	37.79	19 31
77	New bricks disorder	1	290	37.79	17 17
8139	Chairs	8	565	37.77	12 20
12978	SHAPE GAME	3	446	37.75	1 5
11573	A Famous ICPC Team	10	2046	37.72	2 8
16307	Game of stones II	1	24	37.72	34 34

list of classical problems (unsolved)

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