/// <summary>
/// Run the instructions and count the number of multiply instructions executed
/// </summary>
/// <param name="instructions">Instructions to follow</param>
/// <returns>Number of multiply instructions executed</returns>
public int Part1(string[] instructions)
{
var buffer = new Queue <long>();
var duet = new Duet(instructions, buffer, buffer, 0);
// wait until the first message is successfully received
while (!duet.Finished)
{
duet.Step();
}
return(duet.CommandCount["mul"]);
}
/// <summary>
/// Run the instructions until a message is received and then return the last sent message
/// </summary>
/// <param name="instructions">Instructions to follow</param>
/// <returns>Last sent message</returns>
public int Part1(string[] instructions)
{
var buffer = new Queue <long>();
var duet = new Duet(instructions, buffer, buffer, 0);
// wait until the first message is successfully received
while (duet.CommandCount["rcv"] == 0)
{
duet.Step();
}
return((int)duet.LastSent);
}
/// <summary>
/// Run the instructions from the real input file in two Duet instances and return the
/// number of times the second instance sent a message
/// </summary>
/// <param name="instructions">Instructions to follow</param>
/// <returns>Number of sent messages by the second instance</returns>
public int Part2(string[] instructions)
{
var inputA = new Queue <long>();
var inputB = new Queue <long>();
var a = new Duet(instructions, inputA, inputB, 0);
var b = new Duet(instructions, inputB, inputA, 1);
// wait for either deadlock or both terminated normally
while (!(a.Waiting && b.Waiting) && !(a.Finished && b.Finished))
{
while (!a.Finished && !a.Waiting)
{
a.Step();
}
while (!b.Finished && !b.Waiting)
{
b.Step();
}
}
return(b.CommandCount["snd"]);
}