public override string A()
{
IntcodeComputer brain = new IntcodeComputer(Input);
int blocks = 0;
int index = 1;
brain.OnOutput += val => {
if (index++ % 3 == 0 && val == 2)
{
blocks++;
}
};
brain.Start();
return(blocks.ToString());
}
public override string A()
{
long biggest = 0;
foreach (int[] phases in GetPermutations(new[] { 0, 1, 2, 3, 4 }))
{
long input = 0;
foreach (int phase in phases)
{
input = IntcodeComputer.Run(Input, phase, input);
}
if (input > biggest)
{
biggest = input;
}
}
return(biggest.ToString());
}
public override string B()
{
long score = 0;
long[] program = Input.Split(",").Select(long.Parse).ToArray();
program[0] = 2;
IntcodeComputer brain = new IntcodeComputer(program);
long ball = 0;
long paddle = 0;
int index = 0;
long lastX = 0;
brain.OnOutput += val => {
index++;
if (index == 1)
{
lastX = val;
}
else if (index == 3)
{
index = 0;
if (lastX == -1)
{
score = val;
}
else if (val == 3)
{
paddle = lastX;
}
else if (val == 4)
{
ball = lastX;
}
}
};
brain.WantsInput += () => paddle <ball ? 1 : paddle> ball ? -1 : 0;
brain.Start();
return(score.ToString());
}
public override string B()
{
long[] originalProgram = Input.Split(",").Select(long.Parse).ToArray();
long target = 19690720;
long a = 12;
long previous = 0;
long result = 0;
while (result < target)
{
previous = result;
long[] program = (long[])originalProgram.Clone();
program[1] = ++a;
program[2] = 0;
IntcodeComputer.Run(ref program);
result = program[0];
}
long b = target - previous;
return((((a - 1) * 100) + b).ToString());
}