Solution: Word Search II
Explore how to apply the Trie data structure with backtracking and depth-first search to efficiently find multiple words in a 2D letter grid. This lesson helps you reduce search space by matching prefixes and performing controlled exploration. You will understand the approach, implement it, and analyze its time and space complexity for effective word search solutions.
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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