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

#[derive(Debug)]
struct Input {
    l: i32,
    n: i32,
    w: 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 w = (0..n)
        .map(|_| next_token(cin_lock).parse().unwrap())
        .collect();
    Input { l, n, w }
}

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

    let answer = input
        .w
        .into_iter()
        .scan(input.l, |state, x| {
            if *state >= x {
                *state -= x;
                Some(*state)
            } else {
                None
            }
        })
        .count();

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

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

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