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https://leetcode-cn.com/problems/max-area-of-island/
题解
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| class Solution { int getArea(vector<vector<int> > &grid, int i, int j) { if (i == grid.size() || i < 0) return 0; else if (j == grid[0].size() || j < 0) return 0; if (grid[i][j] == 1) { grid[i][j] = 0; return 1 + getArea(grid, i + 1, j) + getArea(grid, i - 1, j) + getArea(grid, i, j + 1) + getArea(grid, i, j - 1); } return 0; }
public: int maxAreaOfIsland(vector<vector<int> > &grid) { int maxArea = 0; int area = 0; for (int i = 0; i < grid.size(); i++) { for (int j = 0; j < grid[0].size(); j++) { if (grid[i][j] == 1) { area = getArea(grid, i, j); maxArea = maxArea > area ? maxArea : area; } } } return maxArea; } };
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