Trie

Trie Insert and Search:

http://www.programcreek.com/2014/05/leetcode-implement-trie-prefix-tree-java/

http://www.geeksforgeeks.org/trie-insert-and-search/

http://www.geeksforgeeks.org/trie-delete/

Trie Problems:

1. Implement Dictionary:

http://www.programcreek.com/2014/05/leetcode-add-and-search-word-data-structure-design-java/

http://www.programcreek.com/2014/06/leetcode-word-search-java/

http://www.programcreek.com/2014/06/leetcode-word-search-ii-java/

http://www.geeksforgeeks.org/longest-prefix-matching-a-trie-based-solution-in-java/

2. DNS Lookup:

http://www.geeksforgeeks.org/implement-forward-dns-look-cache/

http://www.geeksforgeeks.org/implement-reverse-dns-look-cache/

3.Print Unique Rows

http://www.geeksforgeeks.org/print-unique-rows/