class Printer {
public:
    vector<int> clockwisePrint(vector<vector<int> > mat, int n, int m) {
        // write code here
        int x1 = 0, y1 = 0;
        int x2 = n - 1, y2 = m - 1;
        vector<int> res;
        while(x1 <= x2 && y1 <= y2)
        {
            for(int i = y1; i <= y2; ++i)
            {
                res.push_back(mat[x1][i]);
            }
            for(int j = x1 + 1; j <= x2; ++j)
            {
                res.push_back(mat[j][y2]);
            }
            if(x1 < x2)
            {
                for(int i = y2 - 1;i >= y1; --i)
                {
                    res.push_back(mat[x2][i]);
                }
            }
            if(y1 < y2)
            {
                for(int j = x2 - 1; j > x1; --j)
                {
                    res.push_back(mat[j][y1]);
                }
            }
            x1++;
            x2--;
            y1++;
            y2--;
        }
        return res;
    }
};