protected override string?SolvePartOne()
{
var p = new Day19.OpCodeComputer(Input);
while (p.RunOperation())
{
// Run it
}
return(p.registers[0].ToString());
}
protected override string?SolvePartOne()
{
int minInput = Int32.MaxValue;
int minCount = Int32.MaxValue;
// This range was determined by running the Console.WriteLine code for ipVal == 28
// That is the line that exits in the code
// So we needed r[0] == r[2] which was shown to be 8797248
for (int a = 8797247; a < 8797300; a++)
{
p.Reset();
p.registers[0] = a;
// Find if this runs shorter (don't go past 100,000)
int count = 0;
while (count < minCount && count < 10000 && p.RunOperation())
{
count++;
// This helps us figure out why the programs aren't exiting
// if (p.ipVal == 28)
// {
// // This is one place we can exit
// Console.WriteLine($"input={a} ipVal={p.ipVal} r2={p.registers[2]} r0={p.registers[0]}");
// break;
// }
}
if (count < minCount)
{
minCount = count;
minInput = a;
}
}
return(minInput.ToString());
}