use itertools::Itertools;

const INPUT: &str = include_str!("../inputs/01");

fn input_numbers() -> impl Iterator<Item = usize> {
    INPUT.lines().filter_map(|s| s.parse::<usize>().ok())
}

fn part_1() -> usize {
    input_numbers()
        .tuple_windows()
        .filter(|(a, b)| b > a)
        .count()
}

fn part_2() -> usize {
    input_numbers()
        .tuple_windows()
        .map(|(a, b, c)| a + b + c)
        .tuple_windows()
        .filter(|(a, b)| b > a)
        .count()
}

pub fn main() {
    println!("Day 1:");
    println!("  Part 1: {}", part_1());
    println!("  Part 2: {}", part_2());
}