// An OpenQASM 2 program as exporters write it: qelib1.inc's u2, u1 and cu1,
// and every qubit measured at once. u2(0,π) is a Hadamard; with q[1] in |1⟩,
// cu1(π) kicks a phase of −1 back onto q[0], which the second Hadamard turns
// to |1⟩. rx(π/3) leaves q[2] reading 1 with probability 1/4.
OPENQASM 2.0;
include "qelib1.inc";
qreg q[3];
creg c[3];
u2(0,pi) q[0];
x q[1];
cu1(pi) q[0],q[1];
u2(0,pi) q[0];
rx(pi/3) q[2];
measure q -> c;