Integer[][] matrix = new Integer[5][2];

        matrix[0][0] = 1;
        matrix[0][1] = 2;

        matrix[1][0] = 1;
        matrix[1][1] = 3;

        matrix[2][0] = 2;
        matrix[2][1] = 1;

        matrix[3][0] = 3;
        matrix[3][1] = 4;

        matrix[4][0] = 4;
        matrix[4][1] = 3;

        System.out.println(findReciprocal(matrix, 5));