[LeetCode] Surface Area of 3D Shapes 三维物体的表面积

Posted 2021-12-07 grandyang

On a?N?*?N?grid, we place some?1 * 1 * 1?cubes.

Each value?v = grid[i][j]?represents a tower of?v?cubes placed on top of grid cell?(i, j).

Return the total surface area of the resulting shapes.

Example 1:

Input: [[2]]
Output: 10

Example 2:

Input: [[1,2],[3,4]]
Output: 34

Example 3:

Input: [[1,0],[0,2]]
Output: 16

Example 4:

Input: [[1,1,1],[1,0,1],[1,1,1]]
Output: 32

Example 5:

Input: [[2,2,2],[2,1,2],[2,2,2]]
Output: 46

Note:

• 1 <= N <= 50
• 0 <= grid[i][j] <= 50

参考资料：

https://leetcode.com/problems/surface-area-of-3d-shapes/

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