#[macro_export]
macro_rules! setup {
    { mut $input:ident: SplitWhitespace $(,)? } => {
        use std::io::Read;
        let mut buf = String::new();
        std::io::stdin().read_to_string(&mut buf).unwrap();
        let mut $input = buf.split_whitespace();
    };
}

#[macro_export]
macro_rules! parse_next {
    ($str_iter:expr) => {
        $str_iter.next().unwrap().parse().unwrap()
    };
}

fn main() {
    setup! { mut input: SplitWhitespace };

    let l: usize = parse_next!(input);
    let n: usize = parse_next!(input);
    let mut w: Vec<usize> = (0..n).map(|_| parse_next!(input)).collect();

    w.sort();

    let ans = w
        .into_iter()
        .fold((0, 0), |acc, x| match acc.1 + x <= l {
            true => (acc.0 + 1, acc.1 + x),
            false => acc,
        })
        .0;

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