public override string Part2(string input)
{
var ic = new IntCode(input);
ic.SetMemory(0, 2);
var blocks = new HashSet <Point>();
var paddle = 0;
var score = 0;
var ball = 0;
try
{
while (true)
{
var x = (int)ic.RunToOutput();
var y = (int)ic.RunToOutput();
var op = (int)ic.RunToOutput();
switch (op)
{
case 0:
blocks.Remove(new Point(x, y));
break;
case 2:
blocks.Add(new Point(x, y));
break;
case 3:
paddle = x;
break;
case 4:
ball = x;
break;
default:
score = op;
break;
}
if (ball < paddle)
{
ic.SetInput(-1);
}
else if (ball > paddle)
{
ic.SetInput(1);
}
else
{
ic.SetInput(0);
}
}
}
catch (HaltException)
{
return(score.ToString());
}
}
public override string Part1(string input)
{
var painted = new HashSet <Point>();
var point = new Point(0, 0);
var direction = new Point(0, -1);
var ic = new IntCode(input);
try
{
while (true)
{
var color = white.Contains(point) ? 1 : 0;
ic.SetInput(color);
if (ic.RunToOutput() == 1)
{
white.Add(point);
}
else
{
white.Remove(point);
}
painted.Add(point);
if (ic.RunToOutput() == 1)
{
direction = direction.RotateRight();
}
else
{
direction = direction.RotateLeft();
}
point = point.Plus(direction);
}
}
catch (HaltException)
{
return(painted.Count().ToString());
}
throw new InvalidOperationException();
}