_883.java

/**
 * LeetCode 887 - Projection Area of 3D Shapes
 */
public class _883 {

    public int projectionArea(int[][] grid) {
        int ans = 0;

        for (int i = 0; i < grid.length; i++) {
            for (int j = 0; j < grid[i].length; j++) {
                if (grid[i][j] > 0) {
                    ans++;
                }
            }
        }

        for (int i = 0; i < grid.length; i++) {
            int max = 0;
            for (int j = 0; j < grid[i].length; j++) {
                max = Math.max(max, grid[i][j]);
            }
            ans += max;
        }

        for (int j = 0; j < grid[0].length; j++) {
            int max = 0;
            for (int i = 0; i < grid.length; i++) {
                max = Math.max(max, grid[i][j]);
            }
            ans += max;
        }

        return ans;
    }
}