Here is a modified Python script that includes the ideas mentioned:

# Import required libraries
import sha3
from qiskit import QuantumCircuit, QuantumRegister, ClassicalRegister
from qiskit import execute, Aer

# Create the quantum and classical registers
nqubits = 32
qc = QuantumCircuit(QuantumRegister(nqubits), ClassicalRegister(nqubits))

# Initialize the quantum register
for i in range(nqubits):
    qc.x(i)

# Perform the quantum version of the birthday paradox
def quantum_birthday_paradox(target_hash):
    # Perform the quantum algorithm
    qc.barrier()
    qc.h(0)
    qc.h(1)
    qc.cx(0,1)
    qc.cx(0,2)
    qc.cx(1,3)
    qc.cx(2,4)
    qc.cx(3,5)
    qc.cx(4,6)
    qc.cx(5,7)
    qc.cx(6,8)
    qc.cx(7,9)
    qc.h(0)
    qc.h(1)
    qc.measure(range(nqubits), range(nqubits))
    backend = Aer.get_backend('qasm_simulator')
    results = execute(qc, backend, shots=1).result()
    modified_hash = "".join([str(results.get_memory())[i] for i in range(2*nqubits+1) if i % 2 == 1])
    if modified_hash == target_hash:
        print("Success! The message is:", message)
        return True
    else:
        return False

# Perform the quantum version of the birthday paradox
target_hash = sha3.sha3_256(message)
while True:
    if quantum_birthday_paradox(target_hash):
        break

happy birthday GTG