public (string Part1, string Part2) Solve(string input)
{
var lines = input.Split('\n');
for (var i = 0; i < 14; i++)
{
a[i] = ParseNumber(lines[4 + 18 * i]);
b[i] = ParseNumber(lines[5 + 18 * i]);
c[i] = ParseNumber(lines[15 + 18 * i]);
}
var part1 = Solve(true);
var part2 = Solve(false);
#if DEBUG
System.Diagnostics.Debug.Assert(ArithmeticLogicUnit.FromLong(lines, part1).Registers[3] == 0);
System.Diagnostics.Debug.Assert(ArithmeticLogicUnit.FromLong(lines, part2).Registers[3] == 0);
System.Diagnostics.Debug.Assert(ArithmeticLogicUnit.FromLong(lines, part1 + 1).Registers[3] != 0);
System.Diagnostics.Debug.Assert(ArithmeticLogicUnit.FromLong(lines, part2 - 1).Registers[3] != 0);
#endif
return(part1.ToString(), part2.ToString());
}