use std::io::{Read, stdout, BufWriter, Write};

fn main() {
    let width: u32 = read();
    let _max: u32 = read();
    let mut remain: u32 = width;
    let mut count: u32 = 0;
    let mut boxes : Vec<u32> = read_vec();

    boxes.sort();

    for i in boxes {
        if remain < i {
            break
        }
        remain -= i;
        count += 1
    }

    let out = stdout();
    let mut out = BufWriter::new(out.lock());
    writeln!(out, "{}", count).unwrap();
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().split_whitespace().map(|e|
        e.parse().ok().unwrap()
    ).collect()
}

fn read_vec2<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
    (0..n).map(|_| read_vec()).collect()
}