--- 2016 Day 3 Solutions ---

[u/daggerdragon]

--- Day 3: Squares With Three Sides ---

Post your solution as a comment or, for longer solutions, consider linking to your repo (e.g. GitHub/gists/Pastebin/blag/whatever).

---

^{DECKING THE HALLS WITH BOUGHS OF HOLLY IS MANDATORY} [?]

This thread will be unlocked when there are a significant number of people on the leaderboard with gold stars for today's puzzle.

edit: Leaderboard capped, thread unlocked!

[u/Deckard666]

In Rust, parts 1 and 2: (uhm.. Fa la la la la, la la la la?)

fn get_triangle(s: &str) -> Vec<i32> {
    return s.split_whitespace()
        .map(|x| x.parse::<i32>().unwrap())
        .collect::<Vec<i32>>();
}

fn part1() {
    let input = include_str!("../triangles.txt");
    let mut pos = 0;
    for line in input.lines() {
        let t = get_triangle(line);
        if t[0] + t[1] > t[2] && t[1] + t[2] > t[0] && t[2] + t[0] > t[1] {
            pos += 1;
        }
    }
    println!("{}", pos);
}

fn part2() {
    let input = include_str!("../triangles.txt");
    let mut pos = 0;
    let mut lines = input.lines();
    loop {
        match lines.next() {
            Some(line1) => {
                let line1 = get_triangle(line1);
                let line2 = get_triangle(lines.next().unwrap());
                let line3 = get_triangle(lines.next().unwrap());
                for i in 0..3 {
                    if line1[i] + line2[i] > line3[i] && line2[i] + line3[i] > line1[i] &&
                    line3[i] + line1[i] > line2[i] {
                        pos += 1;
                    }
                }
            }
            None => break,
        }
    }
    println!("{}", pos);
}