Rotate Image

You are given an n x n 2D matrix representing an image.

Rotate the image by 90 degrees (clockwise).

Follow up:
Could you do this in-place?

class Solution {
public:
    void rotate(vector<vector<int>>& matrix) {
        int n = matrix.size();
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < i; j++)
            {
                swap(matrix[i][j], matrix[j][i]);
            }
        }

        int left = 0; 
        int right = n-1;
        while (left < right)
        {
            for (int i = 0; i < n; i++)
            {
                swap(matrix[i][left], matrix[i][right]);
            }

            left++;
            right--;
        }
    }
};