use std::env;

pub fn read_file(day: usize) -> String {
    std::fs::read_to_string(
        env::args()
            .nth(1)
            .filter(|n| n != "--bench")
            .unwrap_or_else(|| format!("inputs/day{:0>2}", day)),
    )
    .unwrap()
}

#[inline]
pub fn parse_nums(l: &str) -> Vec<usize> {
    l.split(',').filter_map(|n| n.parse().ok()).collect()
}