AOC2020/aoc2020/lib/aoc20201208.dart

import 'package:aoc2020/aocbase.dart';
import 'package:aoc2020/model/comp.dart';
import 'package:aoc2020/model/readdata.dart';

class AOC20201208 extends AOCBase {
  @override
  Future<void> a({bool test}) async {
    var filename = (test ?? false) ? classStringTest : classString;
    var mylist = await ReadData.readFileString(filename);
    Comp().reset();
    var index = 0;
    var notDone = true;
    while (notDone && index < mylist.length) {
      index = Comp().pc;
      notDone = Comp().execute(mylist[index]);
    }
    answerA = Comp().acc;
  }

  @override
  Future<void> b({bool test}) async {
    var jmpList = <int>[];
    var nopList = <int>[];
    var filename = (test ?? false) ? classStringTest : classString;
    var mylist = await ReadData.readFileString(filename);
    for (var index = 0; index < mylist.length; index++) {
      var parse = mylist[index].split(' ');
      if (parse[0] == 'jmp') jmpList.add(index);
      if (parse[0] == 'nop') nopList.add(index);
    }
    for (var cnt = 0; cnt < jmpList.length; cnt++) {
      // print(' ');
      Comp().reset();
      var index = 0;
      Comp().swapJmp(jmpList[cnt]);
      var notDone = true;
      while (notDone && index < mylist.length) {
        index = Comp().pc;
        if (index < mylist.length) notDone = Comp().execute(mylist[index]);
      }
      if (notDone) {
        answerB = Comp().acc;
        break;
      }
    }
    if (answerB == null) {
    for (var cnt = 0; cnt < nopList.length; cnt++) {
      // print(' ');
      Comp().reset();
      var index = 0;
      Comp().swapNop(nopList[cnt]);
      var notDone = true;
      while (notDone && index < mylist.length) {
        index = Comp().pc;
        if (index < mylist.length) notDone = Comp().execute(mylist[index]);
      }
      if (notDone) {
        answerB = Comp().acc;
        break;
      }
    }}
  }
}