Added solution

Author: avidLearnerInProgress

rotate_image.cpp

@@ -0,0 +1,19 @@
+class Solution {
+public:
+    void rotate(vector<vector<int>>& matrix) {
+        int N = matrix.size();
+        
+        //1. transpose matrix
+        for(int i=0; i<matrix.size(); i++){
+            for(int j=0; j<i; j++){
+                swap(matrix[i][j], matrix[j][i]);
+            }
+        }
+        
+        //2.swap columns with 2 pointer approach
+        
+        for(int i=0; i<N; i++){
+            reverse(matrix[i].begin(), matrix[i].end());
+        }
+    }
+};