Sphere Online Judge (SPOJ)

list of classical problems (unsolved)

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
5466	Electronic queue	5	166	38.11	13 21
5969	Finding Maximum	3	109	30.31	13 23
7035	The Embarrassed Cryptographer	5	358	32.25	13 13
7101	Charly And Nito	4	314	37.22	13 17
7685	Flowers	4	352	32.98	13 26
8424	Life Game	4	156	52.29	13 5
9430	The game of 31		165	39.30	13 17
10240	Circleland	4	713	31.90	13 17
11178	Save money for YTU	2	131	44.13	13 13
13881	FUN WITH LETTERS	6	242	28.47	13 26
14890	Good Code	4	57	22.69	13 17
14979	Diablo Bot	3	78	13.73	13 21
15074	Tourney	4	149	36.87	13 9
15433	Greedy Walking	13	507	51.19	13 16
15728	The Sierpinski Fractal	6	120	27.00	13 9
15867	Great Warrior	2	128	66.67	13 13
16242	Dexters Trampoline	4	61	50.00	13 13
16300	Playing with isosceles triangle	5	322	27.32	13 21
18283	Maggu and Cuteness of Strings	6	171	40.17	13 13
18286	Gopu and Fishes	2	108	47.40	13 26
19561	New Binary	7	298	42.68	13 26
20845	Interesting Numbers	4	221	24.19	13 5
20846	Interesting Selection	5	130	44.09	13 26
21360	Suffix Equal Prefix	5	546	29.37	13 13
22441	Black and White Tiles	-1	33	22.94	13 9
26527	DIVSEQ	17	238	46.49	13 17
26646	An easy Problem	8	69	55.22	13 21
28180	Sanvi Hates Palindrome	5	62	36.32	13 13
28302	Ada and Plus	6	165	44.24	13 13
28547	Ada and Easy Game	7	101	28.80	13 26
28784	IIITM Student	6	98	53.29	13 15
29434	Counting WOW-Substrings2	8	107	45.20	13 19
32079	Ada and Greenflies	8	212	45.50	13 32
36712	Trailing digits	7	62	12.73	13 13
22461	Smallest Number	34	775	27.58	13 15
365	Phidias	25	1226	47.23	13 21
16909	Critical Edges	50	1923	28.73	13 15
368	Cobbled streets	98	5441	50.87	13 12
11814	Eko	172	16736	26.94	14 14
400	To and Fro	90	23449	55.58	14 7
666	Con-Junctions	32	1006	40.93	14 19
5978	Frequent Prime Ranges	10	718	28.82	14 14
18202	HUGE GCD	17	687	33.32	14 13
20172	Divisiblity by 3	11	589	30.54	14 10
26777	Mr. Ant & His Problem	12	243	35.32	14 15
19274	Operators	17	604	20.39	14 20
154	Sweet and Sour Rock	80	3451	51.17	14 17
4580	ABCDEF	218	7923	29.36	14 16
1163	Java vs C ++	17	5524	22.88	14 5
4177	Herding	57	2731	35.22	14 15

list of classical problems (unsolved)

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