www.mikescher.com/www/statics/aoc/2020/01_solution.rs

use crate::common::AdventOfCodeDay;

pub struct Day01 {
    input: Vec<i32>,
}

impl Day01 {
    pub fn new() -> Self {
        let input_bytes = include_bytes!("../res/01_input.txt");
        let input = String::from_utf8_lossy(input_bytes);
        
        let numbers = input.lines().map(|p| p.parse::<i32>().unwrap()).collect::<Vec<i32>>();

        Self {
            input: numbers
        }
    }
}

impl AdventOfCodeDay for Day01 {

    fn task_1(&self) -> String {
        for v1 in &self.input {
            for v2 in &self.input {
                if v1+v2 == 2020 {
                    return format!("{}", v1*v2);
                }
            }
        }
        panic!();
    }

    fn task_2(&self) -> String  {
        for v1 in &self.input {
            for v2 in &self.input {
                for v3 in &self.input {
                    if v1+v2+v3 == 2020 {
                        return format!("{}", v1*v2*v3);
                    }
                }
            }
        }
        panic!();
    }
}