My solutions to AdventOfCode 2021 edition. Link to 2021 Advent of Code.
In the Main class I am using Reflection to retrieve the dates I have completed.
For the class of Day itself we use an abstract class Day, that has 3 functions. solveOne, solveTwo, setup. The setup() function will have default code running that reads the lines from the corresponding file, and then puts it in an ArrayList called input.
If we have to alter those lines to be useful, for example parse them, we can do the following in a DayXX class.
public void setup() {
// This will read the file and put it in input.
super.setup();
// Alter the lines to what we need, for example integers.
numbers = input.stream()
.map(Integer::parseInt)
.collect(Collectors.toList());
}Run from slow laptop
Day 1 challenge 1: 1266. solved in 1ms
Day 1 challenge 2: 1217. solved in 0ms
Day 2 challenge 1: 1762050. solved in 2ms
Day 2 challenge 2: 1855892637. solved in 2ms
Day 3 challenge 1: 3847100. solved in 0ms
Day 3 challenge 2: 4105235. solved in 3ms
Day 4 challenge 1: 63552. solved in 1ms
Day 4 challenge 2: 9020. solved in 2ms
Day 5 challenge 1: 5632. solved in 10ms
Day 5 challenge 2: 22213. solved in 7ms
Day 6 challenge 1: 389726. solved in 74ms
Day 6 challenge 2: 1743335992042. solved in 2ms
Day 7 challenge 1: 336040. solved in 76ms
Day 7 challenge 2: 94813675. solved in 485ms