Solution: Word Search II
Explore how to combine trie data structures with backtracking to efficiently find multiple words in a 2D letter grid. Understand how the trie helps prune search paths, leading to faster solutions by matching prefixes and exploring neighbors with depth-first-search. This lesson covers the implementation details, time and space complexity, and practical techniques for solving Word Search II problems.
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Statement
You are given a list of strings that you need to find in a 2D grid of letters such that the string can be constructed from letters in sequentially adjacent cells. The cells are considered sequentially adjacent when they are neighbors to each other either horizontally or vertically. The solution should return a list containing the strings from the input list that were found in the grid.
Constraints:
- rows, columns