From f5f04b3783e3ad44203227bd5bb8e5804d15e4e2 Mon Sep 17 00:00:00 2001
From: SquidSpirit <squid@squidspirit.com>
Date: Tue, 11 Mar 2025 00:17:59 +0800
Subject: [PATCH] feat: 48_rotate_image

---
 48_rotate_image/main.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 48_rotate_image/main.cpp

diff --git a/48_rotate_image/main.cpp b/48_rotate_image/main.cpp
new file mode 100644
index 0000000..9165d82
--- /dev/null
+++ b/48_rotate_image/main.cpp
@@ -0,0 +1,22 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+class Solution {
+   public:
+    void rotate(vector<vector<int>>& matrix) {
+        const int n = matrix.size();
+        for (int i = 0; i < n / 2; i++) {
+            for (int j = 0; j < n - i * 2 - 1; j++) {
+                // matrix[i][i + j]
+                // matrix[i + j][n - i - 1]
+                // matrix[n - i - 1][n - i - j - 1]
+                // matrix[n - i - j - 1][i]
+                const int tmp = matrix[n - i - j - 1][i];
+                matrix[n - i - j - 1][i] = matrix[n - i - 1][n - i - j - 1];
+                matrix[n - i - 1][n - i - j - 1] = matrix[i + j][n - i - 1];
+                matrix[i + j][n - i - 1] = matrix[i][i + j];
+                matrix[i][i + j] = tmp;
+            }
+        }
+    }
+};