# This code is part of Qiskit.
#
# (C) Copyright IBM 2020.
#
# This code is licensed under the Apache License, Version 2.0. You may
# obtain a copy of this license in the LICENSE.txt file in the root directory
# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
#
# Any modifications or derivative works of this code must retain this
# copyright notice, and modified files need to carry a notice indicating
# that they have been altered from the originals.

"""
Template 7a_1:
.. parsed-literal::
         ┌───┐                    ┌───┐
    q_0: ┤ X ├──■─────────■────■──┤ X ├──■──
         └─┬─┘┌─┴─┐       │  ┌─┴─┐└─┬─┘  │
    q_1: ──■──┤ X ├──■────■──┤ X ├──■────■──
              └───┘┌─┴─┐┌─┴─┐└───┘     ┌─┴─┐
    q_2: ──────────┤ X ├┤ X ├──────────┤ X ├
                   └───┘└───┘          └───┘
"""

from qiskit.circuit.quantumcircuit import QuantumCircuit


def template_nct_7a_1():
    """
    Returns:
        QuantumCircuit: template as a quantum circuit.
    """
    qc = QuantumCircuit(3)
    qc.cx(1, 0)
    qc.cx(0, 1)
    qc.cx(1, 2)
    qc.ccx(0, 1, 2)
    qc.cx(0, 1)
    qc.cx(1, 0)
    qc.ccx(0, 1, 2)
    return qc
