#![allow(unused_imports)]

use std::io::{self, BufRead};
use std::str::FromStr;
use std::collections::*;
use std::cmp::*;

struct Parser<'a> {
    tokens: &'a mut Iterator<Item = String>,
}

impl<'a> Parser<'a> {
    fn new(i: &'a mut Iterator<Item = String>) -> Self {
        Parser {tokens: i}
    }
    fn take<T: FromStr>(&mut self) -> T {
        match self.tokens.next().expect("empty iterator").parse() {
            Ok(x) => x,
            Err(_) => panic!()
        }
    }

    fn take_some<T: FromStr>(&mut self, n: usize) -> Vec<T> {
        self.tokens.take(n).map(|s| match s.parse() { Ok(x) => x, Err(_) => panic!() } ).collect()
    }
}

fn main() {
    let stdin = io::stdin();
    let mut tokens = stdin.lock().lines().filter_map(|x| x.ok()).flat_map(|x| x.split_whitespace().map(|s| s.to_owned()).collect::<Vec<String>>());
    let mut parser = Parser::new(&mut tokens);

    let l: i64 = parser.take();
    let n: i64 = parser.take();
    let mut w: Vec<i64> = parser.take_some(n as usize);
    w.sort();
    let w = w;

    let mut s = 0i64;
    let mut ans = 0;
    for wi in w {
        s += wi;
        if s <= l {
            ans += 1;
        }
    }
    println!("{}", ans);
}