#![allow(dead_code)]
#![allow(unused_variables)]
#![allow(unused_mut)]
use std::env;
use std::fs::File;
use std::io::Read;
use itertools::Itertools;


fn is_safe(arr: &[i32]) -> bool {
    let diff: Vec<i32> = arr.windows(2).map(|w| w[0] - w[1]).collect();
    let inc_ok = diff
        .iter()
        .map(|a| (3 >= a.abs()) && (a.abs() >= 1))
        .all(|a| a);
    let sign_ok = diff.iter().map(|a| *a > 0).all_equal();

    inc_ok && sign_ok
}
fn main() {
    let args: Vec<String> = env::args().collect();
    let filename = if args.len() == 1 {
        "in/".to_owned() + args[0].split('/').last().unwrap() + ".pzl"
    } else {
        args[1].clone()
    };
    let mut f = File::open(filename).expect("cannot open file");
    let mut content = String::new();
    f.read_to_string(&mut content).expect("cannot read file");
    let lines = content.trim_end().split("\n");

    let mut res1 = 0;
    let mut res2 = 0;
    for line in lines {
        let a: Vec<i32> = line.split(" ").map(|a| a.parse().unwrap()).collect();

        if is_safe(&a) {
            res1 += 1;
            res2 += 1;
        } else {
            for i in 0..a.len() {
                let mut b = a.clone();
                b.remove(i);
                if is_safe(&b) {
                    res2 += 1;
                    break;
                }
            }
        }
    }

    println!("res1: {}", res1);
    println!("res2: {}", res2);
    assert_eq!(res1, 257);
    assert_eq!(res2, 328);
}