AoC21/src/day1.rs

pub fn day1() {
    // let input = r#"199
    // 200
    // 208
    // 210
    // 200
    // 207
    // 240
    // 269
    // 260
    // 263"#;
    let input = include_str!("../input/day1.txt");

    let ints = input
        .trim()
        .lines()
        .map(|s| s.trim().parse::<i32>().unwrap());

    let mut iter = ints.clone();
    let mut prev: i32 = iter.next().unwrap();
    let mut count = 0;
    for cur in iter {
        if cur > prev {
            count += 1;
        }
        prev = cur;
    }

    println!("count: {}", count);

    let mut iter = ints.clone().zip(ints.clone().skip(1).zip(ints.skip(2)));
    let first = iter.next().unwrap();
    let mut prev_sum = first.0 + first.1 .0 + first.1 .1;
    let mut new_count = 0;
    for (a, (b, c)) in iter {
        let sum = a + b + c;
        if sum > prev_sum {
            new_count += 1;
        }
        prev_sum = sum;
    }
    println!("new_count: {}", new_count);
}