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Microsoft Q# Coding Contest - Summer 2018:

- Microsoft Q#

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B4. Distinguish four 2-qubit states - 2

time limit per test

1 secondmemory limit per test

256 megabytesinput

standard inputoutput

standard outputYou are given 2 qubits which are guaranteed to be in one of the four orthogonal states:

Your task is to perform necessary operations and measurements to figure out which state it was and to return the index of that state (0 for , 1 for etc.). The state of the qubits after the operations does not matter.

You have to implement an operation which takes an array of 2 qubits as an input and returns an integer.

Your code should have the following signature:

namespace Solution {

open Microsoft.Quantum.Primitive;

open Microsoft.Quantum.Canon;

operation Solve (qs : Qubit[]) : Int

{

body

{

// your code here

}

}

}

Codeforces (c) Copyright 2010-2019 Mike Mirzayanov

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