Sphere Online Judge (SPOJ)

ID	NAME	QUALITY	USERS	DIFFICULTY C I
28308	Ada and Spring Cleaning	51	1263	18 17
32577	Ada and Terramorphing	10	233	31 23
32951	Ada and Substring	14	365	20 21
694	Distinct Substrings	91	5494	21 24
1812	Longest Common Substring II	14	1811	29 29
10570	Longest Common Substring	4	757	31 31
8222	Substrings	6	1215	23 26
7258	Lexicographical Substring Search	28	2042	23 19
705	New Distinct Substrings	41	3667	26 24
27498	Votka and String	3	76	21 12