Z-Algo
- http://www.spoj.com/problems/QUERYSTR/
- http://www.spoj.com/problems/EPALIN/
- http://www.spoj.com/problems/FINDSR/
TRIE — Data structure
- http://www.spoj.com/problems/SUBXOR/
- http://www.spoj.com/problems/PHONELST/
- https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=2683
- http://codeforces.net/problemset/problem/706/D
- http://codeforces.net/problemset/problem/665/E
- http://codeforces.net/problemset/problem/282/E
- http://codeforces.net/problemset/problem/271/D