Solution: Word Search
Explore how to solve the Word Search problem using backtracking and depth-first search techniques. Understand how to traverse a 2D grid of characters, check adjacent cells to form a word sequentially, and backtrack when a path is invalid. This lesson guides you through implementing a recursive solution that efficiently explores all possible paths, marks visited cells, and restores them to find the target word without redundant searches.
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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...