OPENQASM 3.0;
// A GHZ state the plain way: a Hadamard, then a chain of CX down the line.
// Depth n, n - 1 two-qubit gates.
input uint n;
qubit[n] q;
h q[0];
for uint i in [0:n-2] {
  cx q[i], q[i + 1];
}