use std::io::*;
use std::str::FromStr;

pub fn main() {
    let i = stdin();
    let mut o = Vec::new();
    run(i.lock(), &mut o);
    stdout().write_all(&o).unwrap();
}

fn run<R: BufRead, W: Write>(i: R, o: &mut W) {
    let mut i = ReadEx::from(i);
    let mut l = i.read::<usize>();
    let n = i.read::<usize>();
    let mut w = i.read_vec::<usize>(n);
    w.sort();

    let mut r = 0;
    for &w in &w {
        if l < w {
            break;
        }
        r += 1;
        l -= w;
    }
    writeln!(o, "{}", r).unwrap();
}

pub struct ReadEx<R: BufRead> {
    r: R,
    s: String,
}
impl<R: BufRead> ReadEx<R> {
    pub fn from(r: R) -> Self {
        ReadEx {
            r: r,
            s: String::new(),
        }
    }
    pub fn read_line(&mut self) -> &str {
        self.s.clear();
        self.r.read_line(&mut self.s).unwrap();
        self.s.trim()
    }

    pub fn read<T: FromStr>(&mut self) -> T {
        self.read_line().parse().ok().unwrap()
    }

    pub fn read_vec<T: FromStr>(&mut self, n: usize) -> Vec<T> {
        self.read_line()
            .split(' ')
            .take(n)
            .map(|x| x.parse().ok().unwrap())
            .collect()
    }
}