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Autocomplete / Suggestion / Typeahead Search using Trie Data Structure and Algorithm

Autocomplete / Suggestion / Typeahead Search using Trie Data Structure and Algorithm

Autocomplete or suggestion or typeahead offers a number of possible values while typing. I am going to solve this problem using trie data structure and algorithm.
Unique Path III in JavaScript

Unique Path III in JavaScript

On a 2-dimensional grid, there are 4 types of squares. Return the number of 4-directional walks from the starting square to the ending square, that walk over every non-obstacle square exactly once.