Rotate Image

 https://leetcode.com/problems/rotate-image/

 https://www.interviewbit.com/old/problems/rotate-matrix/

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

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