Update 48_旋转图像.md

LeetCode-CN/48_旋转图像.md

@@ -125,3 +125,35 @@ public:
     }
 };
 ```
+### puck
+class Solution
+{
+  public:
+    void rotate(vector<vector<int>> &matrix)
+    {
+        auto n = matrix.size();
+        auto max = n - 1;
+        auto half = n / 2;
+
+        for (int i{}; i < half; ++i)
+        {
+            for (int j{}; j < half; ++j)
+            {
+                std::swap(matrix[i][j], matrix[j][max - i]);
+                std::swap(matrix[i][j], matrix[max - i][max - j]);
+                std::swap(matrix[i][j], matrix[max - j][i]);
+            }
+        }
+
+        if (n == 2 * half + 1)
+        {
+            for (int i{}; i < half; ++i)
+            {
+                std::swap(matrix[i][half], matrix[half][max - i]);
+                std::swap(matrix[i][half], matrix[max - i][half]);
+                std::swap(matrix[i][half], matrix[half][i]);
+            }
+        }
+    }
+};
+```