How to Solve Battleships in a Board Problem
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Battleships in a Board
Given an m x n matrix board where each cell is a battleship 'X' or empty '.', return the number of the battleships on board. Battleships can only be placed horizontally or vertically on board. In othe...
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Understanding the Battleships in a Board Problem
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Problem Statement
Given an m x n matrix board where each cell is a battleship 'X' or empty '.', return the number of the battleships on board. Battleships can only be placed horizontally or vertically on board. In other words, they can only be made of the shape 1 x k (1 row, k columns) or k x 1 (k rows, 1 column), where k can be of any size. At least one horizontal or vertical cell separates between two battleships (i.e., there are no adjacent battleships).
Battleships in a Board
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Examples
board = [["X",".",".","X"],[".",".",".","X"],[".",".",".","X"]]2board = [["."]]0Constraints
m == board.lengthn == board[i].length1 <= m, n <= 200board[i][j] is either '.' or 'X'.Follow up: Could you do it in one-pass, using only O(1) extra memory and without modifying the values board?How Interview Coder Helps with Leetcode Problems
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