use std::io::{self, BufReader, BufWriter, Read, Write};

fn main() {
    let stdin = io::stdin();
    let mut stdin = BufReader::new(stdin.lock());
    let stdout = io::stdout();
    let mut stdout = BufWriter::new(stdout.lock());

    let mut buf = String::new();
    stdin.read_to_string(&mut buf).unwrap();

    let mut iter = buf.split_whitespace();
    let l: u32 = iter.next().unwrap().parse().unwrap();
    let n: usize = iter.next().unwrap().parse().unwrap();
    let mut w: Vec<u32> = iter.take(n).map(|s| s.parse::<u32>().unwrap()).collect();
    w.sort();

    let mut sum = 0;
    for (i, x) in w.into_iter().enumerate() {
        sum += x;

        if sum > l {
            writeln!(&mut stdout, "{}", i).unwrap();
            return;
        }
    }

    writeln!(&mut stdout, "{}", n).unwrap();
}