package Advent2019;

import util.AdventOfCode;

import java.util.List;

public class Day1 extends AdventOfCode {

    public Day1(List<String> input) {
        super(input);
        title = "The Tyranny of the Rocket Equation";
        part1Description = "Total Fuel Requirements: ";
        part2Description = "Total Fuel Requirements to Wishing Really Hard Point: ";
    }

    static int calculate(int n) {
        if (n <= 0) return 0;
        n = n / 3 - 2;
        return Math.max(n, 0) + calculate(n);
    }

    @Override
    public Object part1() {
        return input.stream()
                .mapToInt(Integer::parseInt)
                .map(x -> x / 3 - 2)
                .sum();
    }

    @Override
    public Object part2() {

        return input.stream()
                .mapToInt(Integer::parseInt)
                .map(Day1::calculate)
                .sum();
    }

    @Override
    public void parse() {

    }

}