use crate::io::*;

fn main() {
    let mut io = IO::new();
    let (mut l, n) = io.scan();
    let mut w: Vec<u32> = io.scan_vec(n);
    w.sort_unstable();
    let mut cnt = 0;
    for e in w {
        if e <= l {
            l -= e;
            cnt += 1;
        }
    }
    io.println(cnt);
}




pub use crate::lib::*;

pub mod lib {  ////////////////////////////////////////////////////////////////

pub mod io {  /////////////////////////////////////////////////////////////////

use std::io::{stdout, BufWriter, Read, StdoutLock, Write};

pub struct IO {
    iter: std::str::SplitAsciiWhitespace<'static>,
    buf: BufWriter<StdoutLock<'static>>,
}

impl IO {
    pub fn new() -> Self {
        let mut input = String::new();
        std::io::stdin().read_to_string(&mut input).unwrap();
        let input = Box::leak(input.into_boxed_str());
        let out = Box::new(stdout());
        IO {
            iter: input.split_ascii_whitespace(),
            buf: BufWriter::new(Box::leak(out).lock()),
        }
    }
    fn scan_str(&mut self) -> &'static str {
        self.iter.next().unwrap()
    }
    fn scan_raw(&mut self) -> &'static [u8] {
        self.scan_str().as_bytes()
    }
    pub fn scan<T: Scan>(&mut self) -> T {
        T::scan(self)
    }
    pub fn scan_vec<T: Scan>(&mut self, n: usize) -> Vec<T> {
        (0..n).map(|_| self.scan()).collect()
    }
    pub fn scan_graph(&mut self) -> (usize, usize, Vec<Vec<usize>>) {
        let n = self.scan();
        let m = self.scan();
        let mut graph = vec![Vec::new(); n];
        for _ in 0..m {
            let u: usize = self.scan();
            let v: usize = self.scan();
            graph[u].push(v);
            graph[v].push(u);
        }
        (n, m, graph)
    }
    pub fn scan_digraph(&mut self) -> (usize, usize, Vec<Vec<usize>>) {
        let n = self.scan();
        let m = self.scan();
        let mut graph = vec![Vec::new(); n];
        for _ in 0..m {
            let u: usize = self.scan();
            let v: usize = self.scan();
            graph[u].push(v);
        }
        (n, m, graph)
    }
    pub fn scan_tree(&mut self) -> (usize, Vec<Vec<usize>>) {
        let n = self.scan();
        let mut graph = vec![Vec::new(); n];
        for _ in 0..n - 1 {
            let u: usize = self.scan();
            let v: usize = self.scan();
            graph[u].push(v);
            graph[v].push(u);
        }
        (n, graph)
    }
}

impl IO {
    pub fn print<T: Print>(&mut self, x: T) {
        T::print(self, x);
    }
    pub fn println<T: Print>(&mut self, x: T) {
        self.print(x);
        self.print("\n");
    }
    pub fn iterln<T: Print, I: IntoIterator<Item = T>>(&mut self, iter: I, delim: &str) {
        let mut iter = iter.into_iter();
        if let Some(v) = iter.next() {
            self.print(v);
            for v in iter {
                self.print(delim);
                self.print(v);
            }
        }
        self.print("\n");
    }
    pub fn flush(&mut self) {
        self.buf.flush().unwrap();
    }
}

pub trait Scan {
    fn scan(io: &mut IO) -> Self;
}

macro_rules! impl_parse_int {
    ($($t:tt),*) => { $(
        impl Scan for $t {
            fn scan(s: &mut IO) -> Self {
                let mut res = 0;
                for d in s.scan_raw() {
                    res *= 10;
                    res += (*d - b'0') as $t;
                }
                res
            }
        }
    )* };
}

impl_parse_int!(i32, i64, isize, u32, u64, usize);

impl Scan for u8 {
    fn scan(s: &mut IO) -> Self {
        let bytes = s.scan_raw();
        debug_assert_eq!(bytes.len(), 1);
        bytes[0]
    }
}

impl Scan for &[u8] {
    fn scan(s: &mut IO) -> Self {
        s.scan_raw()
    }
}

impl<T: Scan, U: Scan> Scan for (T, U) {
    fn scan(s: &mut IO) -> Self {
        (T::scan(s), U::scan(s))
    }
}

impl<T: Scan, U: Scan, V: Scan> Scan for (T, U, V) {
    fn scan(s: &mut IO) -> Self {
        (T::scan(s), U::scan(s), V::scan(s))
    }
}

impl<T: Scan> Scan for [T; 2] {
    fn scan(s: &mut IO) -> Self {
        [s.scan(), s.scan()]
    }
}

impl<T: Scan> Scan for [T; 3] {
    fn scan(s: &mut IO) -> Self {
        [s.scan(), s.scan(), s.scan()]
    }
}

impl<T: Scan> Scan for [T; 4] {
    fn scan(s: &mut IO) -> Self {
        [s.scan(), s.scan(), s.scan(), s.scan()]
    }
}

pub trait Print {
    fn print(w: &mut IO, x: Self);
}

macro_rules! impl_print_int {
    ($($t:ty),*) => { $(
        impl Print for $t {
            fn print(w: &mut IO, x: Self) {
                w.buf.write_all(x.to_string().as_bytes()).unwrap();
            }
        }
    )* };
}

impl_print_int!(i32, i64, isize, u32, u64, usize);

impl Print for u8 {
    fn print(w: &mut IO, x: Self) {
        w.buf.write_all(&[x]).unwrap();
    }
}

impl Print for &[u8] {
    fn print(w: &mut IO, x: Self) {
        w.buf.write_all(x).unwrap();
    }
}

impl Print for &str {
    fn print(w: &mut IO, x: Self) {
        w.print(x.as_bytes());
    }
}

impl<T: Print, U: Print> Print for (T, U) {
    fn print(w: &mut IO, (x, y): Self) {
        w.print(x);
        w.print(" ");
        w.print(y);
    }
}

impl<T: Print, U: Print, V: Print> Print for (T, U, V) {
    fn print(w: &mut IO, (x, y, z): Self) {
        w.print(x);
        w.print(" ");
        w.print(y);
        w.print(" ");
        w.print(z);
    }
}

}  // mod io

}  // mod lib