mykdavies

// AOC 2023, Day 2: Cube Conundrum
// Each lines holds a number of draws of coloured cubes from a bag.
// 1) Given some limits, how many lines contain valid draws.
// 2) Determine the minimum cubes needed for each line.
// https://dartpad.dev/?id=203b3f0a9a1ad7a51daf14a1aeb6cf67

import 'dart:math';
import 'package:collection/collection.dart';

MapEntry<int, List<Map<String, int>>> parseLine(String s) {

mykdavies

// AOC 2022, Day 25: Full of Hot Air
// Convert numbers to "balanced base"(q.v.) 5 and back
// https://dartpad.dev/?id=004680836fce05e69a8be7e05b68cf3c

import 'package:collection/collection.dart';

var si = {'2': 2, '1': 1, '0': 0, '-': -1, '=': -2};
var i2s = ['0', '1', '2', '=', '-'];
int sToI(String n) => n.split('').fold(0, (int s, String t) => s * 5 + si[t]!);
String iToS(int i) => [

mykdavies

// AOC 2022, Day 24: Blizzard Basin
// Move round a map avoiding blizzards
// 1) once
// 2) there and back and there again
// https://dartpad.dev/?id=0673f9bfd8af2158050f0e55ba75451b

import 'dart:collection';
import 'dart:math';
import 'package:collection/collection.dart';

mykdavies

// AOC 2022, Day 23: Unstable Diffusion
// Move some elves around according to odd rules
// 1) See how much they spread out after 10 moves.
// 2) How long does it take for them to all get stuck?
// https://dartpad.dev/?id=5c5cc4b78c1b541159db97f34a5b389a

import 'dart:math';

import 'package:collection/collection.dart';

mykdavies

// AOC 2022, Day 22: Monkey Map
// Navigate your way around a grid.
// 1) Following instructions.
// 2) But first, wrap it round a cube.
// https://dartpad.dev/?id=12713657a02660c09fe3c9e548e7d7e9

import 'dart:math';
import 'package:collection/collection.dart';

extension MathNumberExtension on num {

mykdavies

// AOC 2022, Day 21: Monkey Math
// Build a tree
// 1) And visit it.
// 2) And fix the answer.
// https://dartpad.dev/?id=95d1e587ec0cf63b4cfe987e8a582fbf

final ops = {
  '+': (num a, num b) => a + b,
  '-': (num a, num b) => a - b,
  '*': (num a, num b) => a * b,

mykdavies

// AOC 2022, Day 20: Grove Positioning System
// Mix a list according to some rules
// 1) Once.
// 2) Ten times with a key.
// https://dartpad.dev/?id=2ae60c3e3a6ae2edf57a5eff9c298d8d

import 'package:collection/collection.dart';

extension IntegerRangeExtension on int {
  List<int> to(int end, {int step = 1}) =>

mykdavies

// AOC 2022, Day 19: Not Enough Minerals
// Produce some machines that produce resources in a horrible network :-)
// 1) Find best results for a long list.
// 2) Now for a short list over a longer time.
// https://dartpad.dev/?id=741c3d8304eb54a167e065c0702eb38f

import 'dart:math';

import 'package:collection/collection.dart';

mykdavies

// AOC 2022, Day 18: Boiling Boulders
// Find the surface area of a cluster of cubes
// 1) as given
// 2) excluding interior voids
// https://dartpad.dev/?id=d7d31d6b8c9cd1c2b2fb1f4eb272e729

import 'package:collection/collection.dart';

extension IntegerRangeExtension on int {
  List<int> to(int end, {int step = 1}) =>

mykdavies

// AOC 2022, Day 17: Pyroclastic Flow
// Drop simple tetris pieces that get moved sideways by jets of air.
// Both cycle forever. Measure the height of the resulting stack.
// 1) after 2022 pieces.
// 2) after 1000000000000 pieces.
// https://dartpad.dev/?id=7be747054a44186eab0f39911a889b96
import 'dart:math';

import 'package:collection/collection.dart';