How to Solve Word Search Problem
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Word Search
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 constructed from letters of sequentially adjacent cells, where adjacent cells are horizontally or vertically neighboring. The same letter cell may not be used more than once. Example 1: Example 2: Example 3: Constraints: Follow up: Could you use search pruning to make your solution faster with a larger board?
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Understanding the Word Search Problem
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Problem 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 constructed from letters of sequentially adjacent cells, where adjacent cells are horizontally or vertically neighboring. The same letter cell may not be used more than once. Example 1: Example 2: Example 3: Constraints: Follow up: Could you use search pruning to make your solution faster with a larger board?
Word Search
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Examples
# Example 1
board = [["A","B","C","E"],["S","F","C","S"],["A","D","E","E"]], word = "ABCCED"
true
# Example 2
board = [["A","B","C","E"],["S","F","C","S"],["A","D","E","E"]], word = "SEE"
true
# Example 3
board = [["A","B","C","E"],["S","F","C","S"],["A","D","E","E"]], word = "ABCB"
false
Constraints
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Solve Word Search — Given an m x n grid of characters board and a string word, return true if word e...
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Time: O(n) | Space: O(n)
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