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using aoc2019.lib;
using System.Collections.Generic;
using System.Linq;
namespace aoc2019
{
internal class Day7 : Day
{
public override int DayNumber => 7;
private readonly IntCodeVM[] Amplifiers = new IntCodeVM[5];
public Day7()
{
for (var i = 0; i < 5; i++) Amplifiers[i] = new IntCodeVM(Input.First());
}
public override string Part1()
{
long i, largest = 0;
foreach (var phaseSeq in Enumerable.Range(0, 5).Permute())
{
i = 0;
foreach (var (vm, phase) in Amplifiers.Zip(phaseSeq))
{
vm.Reset();
vm.Run(phase, i);
i = vm.Result;
}
if (i > largest)
largest = i;
}
return $"{largest}";
}
public override string Part2()
{
long i, largest = 0;
foreach (var phaseSeq in Enumerable.Range(5, 5).Permute())
{
i = 0;
foreach (var (vm, phase) in Amplifiers.Zip(phaseSeq))
{
vm.Reset();
vm.AddInput(phase);
}
var vms = new Queue<IntCodeVM>(Amplifiers);
while (vms.Count > 0)
{
var vm = vms.Dequeue();
var haltType = vm.Run(i);
if (haltType == IntCodeVM.HaltType.Waiting)
vms.Enqueue(vm);
i = vm.Result;
}
if (i > largest)
largest = i;
}
return $"{largest}";
}
}
}
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