use std::io::{self, Read};

#[derive(Debug)]
struct Input {
    l: i32,
    n: i32,
    ws: Vec<i32>,
}

fn next_token(cin_lock: &mut io::StdinLock) -> String {
    cin_lock
        .by_ref()
        .bytes()
        .map(|c| c.unwrap() as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect::<String>()
}

fn read_input(cin_lock: &mut io::StdinLock) -> Input {
    let l = next_token(cin_lock).parse().unwrap();
    let n = next_token(cin_lock).parse().unwrap();
    let ws = (0..n).map(|_| next_token(cin_lock).parse().unwrap()).collect();
    Input {
        l,
        n,
        ws,
    }
}

fn solve(input: &mut Input, cin_lock: &mut io::StdinLock) {
    input.ws.sort();

    let mut ans = 0;
    let mut sum = 0;
    for w in input.ws.iter() {
        if sum + w > input.l {
            break;
        }

        sum += w;
        ans += 1;
    }

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

fn main() {
    let cin = io::stdin();
    let mut cin_lock = cin.lock();

    let mut input = read_input(&mut cin_lock);
    solve(&mut input, &mut cin_lock);
}