use std::io;
use std::io::prelude::*;

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

    let l: usize = stdin.next().unwrap().parse::<usize>().unwrap();
    let n: usize = stdin.next().unwrap().parse::<usize>().unwrap();

    let mut wn: Vec<usize> = vec![198471237812781; 100010];
    for i in 0..n {
        wn[i] = stdin.next().unwrap().parse::<usize>().unwrap();
    }
    
    wn.sort_unstable();

    let sequence: Vec<_> = wn.into_iter().scan(0, |state, x| {
        *state += x;
        if *state > l {
            None
        }
        else {
            Some(*state)
        } 
    }).collect();
    writeln!(stdout, "{}", sequence.len()).unwrap_or(());
}