[Add] Leetcode > 48. Rotate Image

Author: Joie-Kim

Leetcode/rotate_image.py

@@ -0,0 +1,16 @@
+# 48. Rotate Image
+
+class Solution:
+    def rotate(self, matrix: List[List[int]]) -> None:
+        """
+        Do not return anything, modify matrix in-place instead.
+        """
+        n = len(matrix)
+        
+        for i in range(n):
+            for j in range(i, n):
+                matrix[i][j], matrix[j][i] = matrix[j][i], matrix[i][j]
+        
+        for i in range(n):
+            for j in range(n // 2):
+                matrix[i][j], matrix[i][(n-1)-j] = matrix[i][(n-1)-j], matrix[i][j]