Implement it on LeetCode. Here's the trick: mark visited cells by changing their value (e.g., to '#') instead of using a separate visited array. Remember to restore the original value when backtracking. Optimization: check if the word is even possible (e.g., if it needs more of a letter than the board has).
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$ curl repovive.com/roadmaps/maang-interview-prep/backtracking/word-search-implementation
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