solve 4

Author: lylaminju

rotate-image/lylaminju.py

@@ -0,0 +1,32 @@
+'''
+시간 복잡도: O(n^2)
+공간 복잡도: O(1)
+'''
+from typing import List
+
+
+class Solution:
+    def rotate(self, matrix: List[List[int]]) -> None:
+        n = len(matrix)
+
+        for i in range(n // 2):
+            k = (n - 1) - i * 2
+
+            for j in range(k):
+                end = i + k
+
+                matrix[i][i + j], matrix[i + j][end], matrix[end][end - j], matrix[end - j][i] = matrix[end - j][i], matrix[i][i + j], matrix[i + j][end], matrix[end][end - j]
+
+
+class Solution:
+    def rotate(self, matrix: List[List[int]]) -> None:
+        n = len(matrix)
+        
+        # Step 1: Transpose matrix (swap elements across diagonal)
+        for i in range(n):
+            for j in range(i, n):
+                matrix[i][j], matrix[j][i] = matrix[j][i], matrix[i][j]
+        
+        # Step 2: Reverse each row
+        for i in range(n):
+            matrix[i].reverse()