Solution: Word Search
Explore how to implement a backtracking algorithm to determine if a word exists in a 2D grid by traversing adjacent cells. Learn to apply depth-first search recursively while managing cell visitation to handle all potential paths without extra space. This lesson guides you through the problem setup, solution steps, and complexity analysis to solidify your understanding of backtracking in coding interviews.
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Statement
Given an m x n grid of characters, board, and a string word, return TRUE if word exists in the grid.
The word can be formed by connecting letters of sequentially adjacent cells. The cells are considered sequentially adjacent when neighbors are either horizontally or vertically neighbors. Each cell can be used only once while forming the word.
Constraints:
mboard.lengthnboard[i].length, whereim...