public class Matrix {
    private int[][] m;

    public void init(int[][] base_m) {
        this.m = base_m;
    }

    public int[][] getMatrix() {
        return this.m;
    }

    public void print() {
        for (int[] ml : this.m) {
            for (int e : ml) {
                System.out.printf("%4d ", e);
            }
            System.out.println();
        }
    }

    public void transpose() {
        if (this.m[0].length != this.m.length) {
            int new_h = this.m[0].length;
            int new_w = this.m.length;

            int[][] new_m = new int[new_h][new_w];

            for (int i = 0; i < this.m.length; i++) {
                for (int j = 0; j < this.m[i].length; j++) {
                    new_m[j][i] = this.m[i][j];
                }
            }

            this.m = new_m;
        } else {
            // if a matrix is square, there is no need to
            // make a new one

            int temp_value_holder;

            for (int i = 0; i < this.m.length; i++) {
                for (int j = 0; j < i; j++) {
                    temp_value_holder = this.m[i][j];
                    this.m[i][j] = this.m[j][i];
                    this.m[j][i] = temp_value_holder;
                }
            }
        }
    }

    public double getAvg() {
        double total = 0;

        for (int[] ml : this.m) {
            for (int e : ml) {
                total += e;
            }
        }

        return total / (this.m.length * this.m[0].length);
    }
}