use std::env::args;
use std::fs::File;
use std::io::BufRead;
use std::io::BufReader;

mod number;
use number::Number;

fn main() {
    let path = args().nth(1).unwrap();
    let file = File::open(path).unwrap();

    let numbers: Vec<Number> = BufReader::new(file)
        .lines()
        .map(|l| Number::parse(&l.unwrap()))
        .collect();

    let mut max = 0;

    for i in 0..numbers.len() {
        let a = numbers.iter().nth(i).unwrap();
        for j in 0..numbers.len() {
            if i != j {
                let b = numbers.iter().nth(j).unwrap();
                let m = (a + b).magnitute();
                if m > max {
                    max = m;
                }
            }
        }
    }

    println!("{}", max);
}