CatboxScissors

include "qelib1.inc";
qreg q[5];
creg c[5];

// prepare the referee qubit q[2] as a |+> state
h q[2];

/////////////// INPUT HERE ///////////////
// Make your move by choosing s or sdg
// Comment the one you don't want

s q[2];
//sdg q[2];

/////////////////////////////////////////

// next a quantum opponent also chooses a move
// then a referee compares your choices
// if you chose the same, the opponent wins
// if you chose different, you win



// the quantum player q[0] makes its move
h q[0]; // hadamard to make it random
s q[2]; // apply an s to the referee
// then use a controlled-Z to turn this into sdq if q[0] is |1>
h q[2];
cx q[0],q[2];
h q[2];

// referee is now in |+> state if you lose and |-> if you win, so measure
h q[2];
measure q[2] -> c[4];

// the result 10000 means you win
// the result 00000 means you lose

// to play against a different qubit, replace all instances of q[0] above with
// q[1], q[3] or q[4]