💚Upload 0892 Code

💚Upload 0892 Code

Author: Wonz5130

solutions/0892-Surface-Area-of-3D-Shapes/0892.py

@@ -0,0 +1,17 @@
+class Solution:
+    def surfaceArea(self, grid: List[List[int]]) -> int:
+        n = len(grid)
+        cubes, faces = 0, 0
+        for i in range(n):
+            for j in range(n):
+                cubes += grid[i][j]
+                if grid[i][j] > 0:
+                    # 叠起来的 v 个立方体有 v-1 个接触面
+                    faces += grid[i][j] - 1
+                if i > 0:
+                    # 当前柱子与上边柱子的接触面数量
+                    faces += min(grid[i-1][j], grid[i][j])
+                if j > 0:
+                    # 当前柱子与左边柱子的接触面数量
+                    faces += min(grid[i][j-1], grid[i][j])
+        return 6 * cubes - 2 * faces